Seiko Cal. 6657 - 420

This Spring Drive model from 1981 features a 39mm Two-Tone case. It features a Cream dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-2694becdc4aa]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1981

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