Seiko Cal. 4432 - 729

This Spring Drive model from 1984 features a 39mm Hardlex-Coated Steel case. Powered by the 4432 caliber with 25j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-bf108d45fa23]

Also known as: Sumo, Pogue

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1984

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