DESK DIVES
11 watches · Mostly Seiko, some Swiss, a few old ones
No. 10 · Seiko · Prospex · Diver's 300 m

MarineMaster 300

The MM300: Seiko's professional 300 m diver. A one-piece steel case with no caseback, and the 8L35 movement inside.

44.3Case mm
300Water res. m
50Power res. h
Seiko MarineMaster 300 SBDX017 watch
Plate 10 · Seiko MarineMaster 300

More plates and videos

Seiko MarineMaster 300: Driving
Plate 10.2 · Driving
Seiko MarineMaster 300: On the wrist
Plate 10.3 · On the wrist
Seiko MarineMaster 300: Lume, on grey rubber
Plate 10.4 · Lume, on grey rubber