Seiko Cal. 6371 - 956

This Spring Drive model from 1968 features a 39mm Two-Tone case. It features a Silver dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-e9db8759b8b1]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1968

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