Seiko Cal. 3840 - 231

This Hand-Winding model from 1976 features a 34mm Titanium case. Powered by the 3840 caliber with 33j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-fa013b3cf770]

Also known as: Monster, Shogun

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1976

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