Seiko Cal. 7140 - 477

Seiko 7140-477

The 7140-477 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7140 caliber with 22j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-51d5f1343d7c]

Also known as: Silverwave, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
38mm
Case Thickness
9.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
160m
Dial Color
Silver
Jewels
22j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1979

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seikata-wm-51d5f1343d7c