Bezel insert
No-decompression bezel insert
ProbableThe Doxa bezel insert carries the US Navy no-decompression limits — depth against maximum bottom time — instead of a plain sixty-minute scale. It makes the bezel a calculating instrument rather than an elapsed-time indicator, and it is the most distinctive single component on the brand.
Part reference
- Brand
- Doxa
- Material
- Printed or engraved metal insert
- Introduced
- 1967
Documented variations
Classification
FactoryDocumented as shipped from the factory for this reference and period.PeriodNot original to this watch, but correct for its production period.ServiceFitted by the manufacturer's own service network. Not a defect.AftermarketThird-party part. Affects originality, not authenticity.ModifiedGenuine parts in a configuration the factory did not sell. Affects originality and value, not authenticity.CounterfeitDeceptive reproduction intended to pass as genuine.UnknownEvidence on file does not settle the question.Original insert, faded consistently with the case
FactoryProbableWhole production
Period inserts fade, and the fading should be consistent with the case's wear and with the dial's aging. Consistency across components is the evidence; the insert alone establishes little.
Replacement or reproduction insert
AftermarketProbableWhole production
Crisp, unfaded printing on a case with decades of wear. Inserts are consumable and replacements — genuine service parts and reproductions alike — are widely available. A restoration finding, very common, and not evidence against the watch.
Table figures inconsistent with any published US Navy table
CounterfeitProbableWhole production
Because the insert reproduces an external published standard, it can be checked against one. Figures that correspond to no table, or to a table not current in the watch's claimed period, indicate a reproduction made by someone copying an appearance rather than a document.
Documented on these references
- Doxa SUB 300 (1967)Factory
1967 →
Check the table figures against the US Navy table current in the period, and check the fading against the rest of the watch.
- Doxa SUB 300 (reissue)Factory
Whole production
- Doxa SUB 300T ConquistadorFactory
Whole production
Provenance of this record
Sources & Evidence
United States Navy no-decompression limits and diving tables
United States Navy
- Accessed
- 2026-08-19
Cited for
Doxa collector research on SUB variants, dial signatures and the Synchron era
Collector communities and specialist dealers
- Accessed
- 2026-08-19
Cited for
Last verified: Not yet reviewed