DOXA Sub 300 'No-T' Professional
Record status
Individual type · partial
Period
1967
Maker / issuer
DoxaThis Doxa Sub 300 'No-T' Professional is a dive watch from 1967, the first year of the model's production. The watch features a 42.5mm steel cushion case with an acrylic crystal and a unidirectional decompression timing bezel.
The dial is orange and marked 'Professional'. The movement is an automatic-winding ETA caliber. This specific example is identified as a thin-cased 'No-T' variant, produced for only one year. The watch is supplied on an 'expandro' beads-of-rice bracelet featuring a Doxa-signed ratcheting clasp. The caseback is embossed with a sailing ship motif. According to the provided information, the dial of this example has undergone professional re-luming.
The design incorporates features intended for professional diving, including a luminous oversized minute hand and a bezel engraved with US Navy no-decompression dive timing marks.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Diver's wristwatch
- Maker
- DOXA
- Model
- Sub 300 'No-T' Professional
- Dial color
- Orange
- Bracelet type
- Beads-of-rice 'expandro'
- Case diameter
- 42.5mm
- Movement type
- Automatic-winding ETA
- Place recorded
- Switzerland
- Caseback detail
- Sailing ship
- Year of production
- 1967
- Maker / attribution
- DOXA
Design
- Visible features
- • The orange dial displays the 'Professional' designation and luminous markers. • The bezel includes markings for decompression depths in feet. • The case exhibits a cushion-shaped profile in stainless steel. • The bracelet is a beads-of-rice style link configuration.
- Case and Dial Design
- The watch features a 42.5mm stainless steel cushion-shaped case paired with an acrylic crystal. The caseback displays a sailing ship motif. The bezel is constructed of steel and provides unidirectional movement for timing dives, specifically engraved with US Navy no-decompression dive timing marks. The orange dial, identified by the 'Professional' nomenclature, is a primary feature of this model. The hands include an oversized minute hand intended for improved visibility under water. The vendor reports that the dial has been subject to a professional re-luming process.
- Movement and Bracelet
- The watch is equipped with an automatic-winding movement produced by ETA. This movement is described as robust and proven, suited for the intended use of the watch as a diving instrument. It is fitted with a beads-of-rice 'expandro' bracelet. This bracelet includes a ratcheting clasp which is signed by Doxa, allowing for adjustment to the length of the band.
- Historical Context and Attribution
- This watch dates to 1967, which is identified as the first year of production for the Sub 300 series. The 'No-T' nomenclature refers to a thin-cased variant of the model that was manufactured for a single year. The series is credited with introducing several innovations to the diver watch category, including the unidirectional bezel with no-decompression markings and the expanding bracelet design.
Identification
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: The dial has been professionally re-lumed, altering the original factory condition.
- Research required: The precise movement caliber reference is not specified beyond 'ETA'.
- Research required: The 'No-T' designation is an industry-derived term for this specific production run.