Seiko Cal. 4437 - 358

This Spring Drive model from 1981 features a 41mm Hardlex-Coated Steel case. Powered by the 4437 caliber with 32j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-f09794876be8]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1981

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