Seiko Cal. 5642 - 913

This Quartz model from 1973 features a 41mm Hardlex-Coated Steel case. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-c9b8d1259a57]

Also known as: Tuna, Silverwave

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1973

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