Derived maker summary
Tier IIIThe British Bench editorial classification — Derived directory summary — all eligible current families share this published physical tierStudio Underd0g
British independent watch company whose three current core families are assembled fully in-house at The D0ghouse in Maidenhead, with international movements and assembler-level paperwork traceability.
Editorial classification
The British Bench editorial classification
The British Bench records documented facts about where design, development, component manufacture, assembly, regulation, testing, quality control and related work take place, then applies its own editorial provenance methodology to those facts. A tier is an editorial classification only. It does not determine whether a watch, company or claim is legally British or British-made; assess compliance with origin, advertising or consumer-protection rules; certify or approve a product or maker; or measure quality, value, legitimacy or company nationality. A higher tier confers no legal status, certification, approval or endorsement. A lower tier does not mean a less-British company, a worse watch, misconduct or an improper or unlawful origin claim.
Headline decision
Tier III
All 3 current production families share this published tier.
- All 3 current production families share this published tier.
- Tier III is a directory summary derived from the current family classifications below; it does not transfer a physical tier between watches.
Documented factual findings
What happens within the qualifying territory
Published operations are shown here; the route cards identify how The British Bench interprets them for each physical tier.
Assembler identity recorded on current watch paperwork
Current watches carry assembler-level paperwork traceability through the initials of the person who assembled the watch; final-release QC traceability remains a separate evidence question.
Great BritainComplete current watch assembly at The D0ghouse in Maidenhead
All three current regular-production families are assembled fully in-house at Studio Underd0g’s British watchmaking operation, with each watch built start to finish by one assembler.
The D0ghouse, Maidenhead, England01SERIES ST-1901B movement regulation in Great Britain
The current 01SERIES ST-1901B route is regulated in Great Britain to -10/+15 seconds per day; post-casing sequence and recheck detail remain unresolved.
Great BritainDocumented factual findings
What is made or completed elsewhere
Documented imported components and international specialist work remain visible beside domestic operations.
03SERIES Swiss Sellita SW510 M movement supply
03SERIES uses the Swiss Sellita SW510 M; its movement-grade accuracy statement is disclosed separately from the unresolved completed-watch release sequence.
Switzerland02SERIES Swiss Sellita SW200-2 M movement supply
02SERIES Gen2 uses the Swiss Sellita SW200-2 M; its published accuracy specification is not treated as proof of post-casing British timing or corrective regulation.
Switzerland01SERIES bespoke Seagull ST-1901B movement supply
01SERIES uses the bespoke Seagull ST-1901B movement; British work evidenced here is assembly and regulation rather than movement manufacture.
International supply — SeagullRoute-level decisions
Where the physical classification changes
The maker summary never replaces these model- and collection-level decisions.
03SERIES current route
Collection · Provisional — strong evidence with defined gaps
The British Bench’s editorial interpretation
- Current official material states that every Studio Underd0g watch is assembled fully in-house in Great Britain and that all watches are now assembled through The D0ghouse in Maidenhead.
- Each current watch is assembled start to finish by one person, with the assembler’s initials recorded on the accompanying paperwork.
- The current physical route is strongly consistent with Tier III British assembly, while the remaining release-chain details are published as defined evidence gaps rather than inferred.
- The current 03SERIES page publishes a ±5 seconds-per-day figure for the Sellita movement grade; this is not treated as evidence of completed-watch post-casing timing or current corrective regulation/recheck.
- The current 03SERIES is rated to 5 ATM; current production pressure-test method and traceability are not published.
International work
- The movement is internationally manufactured and is disclosed on the current family product page; no British movement manufacture is inferred.
Why the next tier is not met
- Current evidence does not establish repeatable British manufacture from stock, blank or equivalent starting form of a principal movement, case, dial or complete hand-set family connected to these watches, so Tier II is not met.
Evidence gaps
- Confirm the current D0ghouse incoming-inspection, dial-fitting, hand-fitting, casing-up and stem/crown verification sequence at the process depth required by Tier III rather than relying only on the broad “assembled fully in-house” statement.
- Confirm whether every current completed watch is timed after final casing against a documented house acceptance tolerance, including timing positions and duration where available.
- Confirm the current corrective regulation, defined rework or controlled rejection process when a completed watch falls outside tolerance, together with mandatory recheck after intervention.
- Confirm the current post-casing functional test matrix and final visual/functional pass-fail release authority for each core family.
- Confirm whether final release is recorded against each serial number or a controlled production batch; assembler initials are recorded but are not treated as proof of the separate final-QC release record.
- Confirm whether the earlier Horologium demagnetisation, three-position timing/regulation and report-card process continues after assembly moved fully in-house, moved into The D0ghouse, or has been replaced.
- For the 5 ATM and 10 ATM current families, document pressure-test scope, method, test pressure, location and traceability.
Documented factual findings attached to this route
All three current regular-production families are assembled fully in-house at Studio Underd0g’s British watchmaking operation, with each watch built start to finish by one assembler.
The D0ghouse, Maidenhead, EnglandCurrent watches carry assembler-level paperwork traceability through the initials of the person who assembled the watch; final-release QC traceability remains a separate evidence question.
Great Britain03SERIES uses the Swiss Sellita SW510 M; its movement-grade accuracy statement is disclosed separately from the unresolved completed-watch release sequence.
SwitzerlandIdentifiable evidence supporting this route
02SERIES Gen2 current route
Collection · Provisional — strong evidence with defined gaps
The British Bench’s editorial interpretation
- Current official material states that every Studio Underd0g watch is assembled fully in-house in Great Britain and that all watches are now assembled through The D0ghouse in Maidenhead.
- Each current watch is assembled start to finish by one person, with the assembler’s initials recorded on the accompanying paperwork.
- The current physical route is strongly consistent with Tier III British assembly, while the remaining release-chain details are published as defined evidence gaps rather than inferred.
- Current 02SERIES Gen2 pages publish a -7/+7 seconds-per-day accuracy figure but do not identify it as completed-watch post-casing timing or establish the current corrective regulation/recheck sequence.
- The current 02SERIES Gen2 is rated to 10 ATM; current production pressure-test method and traceability are not published.
International work
- The movement is internationally manufactured and is disclosed on the current family product page; no British movement manufacture is inferred.
Why the next tier is not met
- Current evidence does not establish repeatable British manufacture from stock, blank or equivalent starting form of a principal movement, case, dial or complete hand-set family connected to these watches, so Tier II is not met.
Evidence gaps
- Confirm the current D0ghouse incoming-inspection, dial-fitting, hand-fitting, casing-up and stem/crown verification sequence at the process depth required by Tier III rather than relying only on the broad “assembled fully in-house” statement.
- Confirm whether every current completed watch is timed after final casing against a documented house acceptance tolerance, including timing positions and duration where available.
- Confirm the current corrective regulation, defined rework or controlled rejection process when a completed watch falls outside tolerance, together with mandatory recheck after intervention.
- Confirm the current post-casing functional test matrix and final visual/functional pass-fail release authority for each core family.
- Confirm whether final release is recorded against each serial number or a controlled production batch; assembler initials are recorded but are not treated as proof of the separate final-QC release record.
- Confirm whether the earlier Horologium demagnetisation, three-position timing/regulation and report-card process continues after assembly moved fully in-house, moved into The D0ghouse, or has been replaced.
- For the 5 ATM and 10 ATM current families, document pressure-test scope, method, test pressure, location and traceability.
Documented factual findings attached to this route
All three current regular-production families are assembled fully in-house at Studio Underd0g’s British watchmaking operation, with each watch built start to finish by one assembler.
The D0ghouse, Maidenhead, EnglandCurrent watches carry assembler-level paperwork traceability through the initials of the person who assembled the watch; final-release QC traceability remains a separate evidence question.
Great Britain02SERIES Gen2 uses the Swiss Sellita SW200-2 M; its published accuracy specification is not treated as proof of post-casing British timing or corrective regulation.
SwitzerlandIdentifiable evidence supporting this route
01SERIES Gen3 current route
Collection · Provisional — strong evidence with defined gaps
The British Bench’s editorial interpretation
- Current official material states that every Studio Underd0g watch is assembled fully in-house in Great Britain and that all watches are now assembled through The D0ghouse in Maidenhead.
- Each current watch is assembled start to finish by one person, with the assembler’s initials recorded on the accompanying paperwork.
- The current physical route is strongly consistent with Tier III British assembly, while the remaining release-chain details are published as defined evidence gaps rather than inferred.
- Current 01SERIES pages additionally state that all ST-1901B movements are regulated in Great Britain to -10/+15 seconds per day; the exact post-casing sequence remains unresolved.
- The current 01SERIES is rated to 5 ATM; current production pressure-test method and traceability are not published.
International work
- The movement is internationally manufactured and is disclosed on the current family product page; no British movement manufacture is inferred.
Why the next tier is not met
- Current evidence does not establish repeatable British manufacture from stock, blank or equivalent starting form of a principal movement, case, dial or complete hand-set family connected to these watches, so Tier II is not met.
Evidence gaps
- Confirm the current D0ghouse incoming-inspection, dial-fitting, hand-fitting, casing-up and stem/crown verification sequence at the process depth required by Tier III rather than relying only on the broad “assembled fully in-house” statement.
- Confirm whether every current completed watch is timed after final casing against a documented house acceptance tolerance, including timing positions and duration where available.
- Confirm the current corrective regulation, defined rework or controlled rejection process when a completed watch falls outside tolerance, together with mandatory recheck after intervention.
- Confirm the current post-casing functional test matrix and final visual/functional pass-fail release authority for each core family.
- Confirm whether final release is recorded against each serial number or a controlled production batch; assembler initials are recorded but are not treated as proof of the separate final-QC release record.
- Confirm whether the earlier Horologium demagnetisation, three-position timing/regulation and report-card process continues after assembly moved fully in-house, moved into The D0ghouse, or has been replaced.
- For the 5 ATM and 10 ATM current families, document pressure-test scope, method, test pressure, location and traceability.
Documented factual findings attached to this route
All three current regular-production families are assembled fully in-house at Studio Underd0g’s British watchmaking operation, with each watch built start to finish by one assembler.
The D0ghouse, Maidenhead, EnglandCurrent watches carry assembler-level paperwork traceability through the initials of the person who assembled the watch; final-release QC traceability remains a separate evidence question.
Great Britain01SERIES uses the bespoke Seagull ST-1901B movement; British work evidenced here is assembly and regulation rather than movement manufacture.
International supply — SeagullThe current 01SERIES ST-1901B route is regulated in Great Britain to -10/+15 seconds per day; post-casing sequence and recheck detail remain unresolved.
Great BritainIdentifiable evidence supporting this route
Source ledger
What this record rests on
Named public sources and public-safe disclosures of confidential reliance are shown without exposing private evidence. The letter is the methodology evidence band, not a product-quality score.
Current 01SERIES Gen3 product page identifying the bespoke Seagull ST-1901B, Great Britain regulation to -10/+15 seconds per day, full in-house British assembly and a 5 ATM water-resistance rating.
Studio Underd0gCurrent 02SERIES Gen2 product page identifying complete in-house British assembly, single-assembler paperwork traceability, the Swiss Sellita SW200-2 M movement, a published -7/+7 seconds-per-day accuracy specification and 10 ATM water resistance.
Studio Underd0gCurrent 03SERIES Salm0n page identifying complete in-house British assembly, single-assembler paperwork traceability, the Swiss Sellita SW510 M monopusher movement, a ±5 seconds-per-day movement-grade accuracy statement and 5 ATM water resistance.
Studio Underd0gCurrent official page stating that every Studio Underd0g watch is assembled fully in-house in Great Britain, start to finish by one assembler whose initials appear on the paperwork, and identifying 01SERIES Gen3, 02SERIES Gen2 and 03SERIES as the core current range.
Studio Underd0gCurrent official workshop page stating that assembly has been brought fully in-house at The D0ghouse in Maidenhead and that all Studio Underd0g watches will be assembled there from now on.
Studio Underd0g