Seiko Cal. 6663 - 620

This Spring Drive model from 1975 features a 37mm Titanium case. It features a White dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-b446ba9a5535]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1975

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