Seiko Cal. 5639 - 443

This Hand-Winding model from 1973 features a 44mm Gold-Plated case. Powered by the 5639 caliber with 22j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-1273939ef538]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1973

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