Seiko Cal. 5666 - 631

The 5666-631 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5666 caliber with 19j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-e6afdb763353]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1966

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