Seiko Cal. 5657 - 566

Seiko 5657-566

The 5657-566 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5657 caliber with 25j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-57d1c7ca44ba]

Also known as: Monster, Helmet

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
36mm
Case Thickness
10.9mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1975

Related Models

seikata-wm-57d1c7ca44ba