Seiko Cal. 4440 - 442

This Spring Drive model from 1991 features a 41mm Stainless Steel case. Powered by the 4440 caliber with 36j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-9bb7e7009c41]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1991

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