Seiko Cal. 4537 - 129

This Spring Drive model from 1972 features a 40mm Titanium case. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-80feaf8aa412]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1972

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