Seiko Cal. 4439 - 638

Seiko 4439-638

The 4439-638 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4439 caliber with 25j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-8de59c85b85f]

Also known as: Sea Horse

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
34mm
Case Thickness
12.4mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Green
Jewels
25j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1981

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