Seiko Cal. 4486 - 827

This Spring Drive model from 1976 features a 37mm Gold-Plated case. It features a White dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-b68040336c71]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1976

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