Seiko Cal. 4437 - 731

The Seiko 4437-731 represents an important milestone in Seiko's 1966 lineup. It features a Silver dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-5de3ce597a42]

Also known as: Sea Horse, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Silver

Jewels

29j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1966

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