Seiko Cal. 5639 - 337

This Hand-Winding model from 1993 features a 40mm Stainless Steel case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-86f36f15aaf4]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1993

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