Seiko Cal. 4437 - 389

The Seiko 4437-389 represents an important milestone in Seiko's 1986 lineup. Powered by the 4437 caliber with 31j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-04fe529559f9]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1986

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