Seiko Cal. 7189 - 406

This Spring Drive model from 1976 features a 39mm Titanium case. Powered by the 7189 caliber with 29j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-6dec6a2a4145]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1976

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