Seiko Cal. 4440 - 737

This Spring Drive model from 1975 features a 43mm Hardlex-Coated Steel case. Powered by the 4440 caliber with 35j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-c60a9bbb8fb5]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1975

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