Seiko Cal. 5657 - 740

Seiko 5657-740

The 5657-740 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-e384fef43641]

Also known as: Samurai

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
13.6mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Blue Sunburst
Jewels
32j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1971

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