Seiko Cal. 4432 - 729

This Spring Drive model from 1966 features a 37mm Hardlex-Coated Steel case. Powered by the 4432 caliber with 36j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-bdb2dbbf30c3]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1966

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