Seiko Cal. 3881 - 394

This Spring Drive model from 1974 features a 46mm Two-Tone case. It features a Green dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-1785ce8439be]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1974

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