Seiko Cal. 5645 - 939

The Seiko 5645-939 represents an important milestone in Seiko's 1974 lineup. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-923ab2ef3cce]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1974

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