Seiko Cal. 5657 - 742

Seiko 5657-742

The 5657-742 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5657 caliber with 36j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-7fb9725a9d13]

Also known as: Tuna, Crown

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
10.7mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Black
Jewels
36j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1996

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