Seiko Cal. 7011 - 640

Seiko 7011-640

The 7011-640 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7011 caliber with 31j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-565fef800d11]

Also known as: Helmet

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
10.8mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Green
Jewels
31j
Frequency
36,000 bph
Power Reserve
62 hours
Year
1970

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