Seiko Cal. 5640 - 980

Seiko 5640-980

The 5640-980 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5640 caliber with 29j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-dadaba840928]

Also known as: Samurai, Helmet

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
34mm
Case Thickness
10.7mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
50m
Dial Color
White
Jewels
29j
Frequency
28,800 bph
Power Reserve
71 hours
Year
1997

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seikata-wm-dadaba840928