Seiko Cal. 5657 - 686

This Automatic model from 1978 features a 39mm PVD Black case. It features a Cream dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-eb2809fc0cb1]

Also known as: Helmet, Silverwave

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1978

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