Seiko Cal. 5656 - 387

This Automatic model from 1979 features a 38mm Titanium case. Powered by the 5656 caliber with 30j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-9438326ea6d5]

Also known as: Samurai, Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

38mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1979

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