Seiko Marinemaster Automatic Professional 1000M Diver Emperor Tuna SBDX013

Mint and barely used looking condition Seiko Marinemaster nicknamed Emperor Tuna reference SBDX013 . This is a Japan only market model so difficult to get elsewhere in the world. Seiko Tuna is the name given to Seikos range of watches designed for scuba and professional diving. In particular. Seiko made these watches with saturation diving or greater depth diving in mind. All of the watches in the Seiko Tuna range are characterized by protective screwed on shrouds that have earned them the nickname of Tuna. This in addition to the special gaskets could not allow helium to enter the watch and therefore no need for a helium escape valve for saturation diving. This presented a unique and robust professional divers watch.

Features Automatic 8L35 movement similar in quality to Grand Seiko movements, so is the premium line of movements.

Movement
Caliber: 8L35
Type: Automatic with manual winding capacity
Accuracy: +15 to -10 seconds per day
Power Reserve: Approx. 50 hours
28,800 vibration/hour
Antimagnetic

Case
Case Material: Titanium case with super-hard coating and ceramics case
Case Size: Diameter 52.4mm, Thickness 17.2mm
Crystal: Sapphire Crystal
Band Material: Silicon
Dial: Black
LumiBrite: Hands and indexes

Features
Water Resistance 1000M
Date Display at 4/5 position
Screw Lock Crown
26 Jewels