Seiko Cal. 5657 - 436

Seiko 5657-436

The 5657-436 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5657 caliber with 31j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-f364409f0b11]

Also known as: Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
10.0mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
130m
Dial Color
Black
Jewels
31j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1979

Related Models

seikata-wm-f364409f0b11