Seiko Cal. 4437 - 645

The Seiko 4437-645 represents an important milestone in Seiko's 1967 lineup. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-45daab6244cf]

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1967

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