Seiko Cal. 3888 - 536

This Spring Drive model from 1972 features a 35mm Titanium case. Powered by the 3888 caliber with 32j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-83ce7bd7aba0]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Navy

Jewels

32j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1972

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