Seiko Cal. 5640 - 405

This Solar model from 1978 features a 37mm Gold-Plated case. It features a White dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-5acb5b17afb4]

Also known as: Bullhead, Silverwave

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1978

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