Seiko Cal. 6634 - 750

This Spring Drive model from 1972 features a 43mm Titanium case. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-b89e257a8963]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

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