Seiko Cal. 0770 - 641

This Spring Drive model from 1974 features a 43mm PVD Black case. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-17793ac36fb4]

Also known as: Samurai, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1974

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