Description - Marine Master Transocean Barometer
The “prototype-SBDX” Marinemaster. Titanium, ocean-expedition vibes, and an honest-to-goodness barometer/pressure-trend instrument on the wrist.
Overview
- Model / case code: Seiko 7K32-0A20 (SBCN005 caseback photographed)
- Serial number: 930479 (March 1999)
- Movement: Seiko analogue quartz cal. 7K32 (barometer + alarm + second time zone capability)
- Case/bracelet: Titanium case and bracelet
- Service: Serviced Jan 2026 — new seals + new 3023.5MY energy storage unit (capacitor) fitted
- Running condition: [running well / holds charge / time relay works]
- Included: [watch with original bracelet]
Condition- Crystal: Clean
- Case: Light-moderate wear
- Dial/hands/lume: All in great condition, lume bright
- Crown: Pull out crown
Measured specifications
- Case diameter (excluding crown): 44
- Thickness: 13 mm
- Lug-to-lug: 47 mm
- Lug width: 20 mm
Movement / functions
- Timekeeping: [OK]
- Date: [OK]
- Barometer / pressure reading: [OK]
- Pressure tendency / trend: [OK]
- Second time zone: [OK]
- Alarm: [OK]
About this model
The
Marine Master Transocean SBCN005 is described as the
quartz Marinemaster that predates the famous automatic SBDX001 era, built in titanium and powered by Seiko’s
7K32 instrument-style quartz movement. It is aimed squarely at sailors and expedition travel, pairing a wearable sports case with a functional
barometer/pressure trend display plus alarm and a second time zone.
Seiko documentation for the calibre family is also explicit about the “instrument” nature of the movement (it’s not decorative subdials pretending to be tools)
Important notes
Serviced Jan 2026 with seals replaced/checked, but not pressure-tested by me — treat as non-waterproof unless tested. Photos form part of the description. Vintage watch sold as described; please review photos as part of the description.