Seiko Cal. 6642 - 821

This Spring Drive model from 1984 features a 41mm PVD Black case. It features a White dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-ebcc1231bc9c]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1984

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