Seiko Cal. 6639 - 260

Seiko 6639-260

The 6639-260 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6639 caliber with 36j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-6214bdb1ac06]

Also known as: Helmet, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
46mm
Case Thickness
15.4mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1992

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seikata-wm-6214bdb1ac06