Seiko Cal. 0721 - 763

This Spring Drive model from 1966 features a 39mm Gold-Plated case. It features a Cream dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-f42368ba8787]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1966

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