Seiko Cal. 6639 - 539

Seiko 6639-539

The 6639-539 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6639 caliber with 25j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-ecb2a937265e]

Also known as: World Timer

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
15.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1974

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seikata-wm-ecb2a937265e