Seiko Cal. 3870 - 956

This Spring Drive model from 1967 features a 46mm Titanium case. It features a Green dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-64a6e8097588]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1967

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