Seiko Cal. 5660 - 238

This Hand-Winding model from 1972 features a 36mm Hardlex-Coated Steel case. Powered by the 5660 caliber with 23j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-857bb53b4bfa]

Also known as: Silverwave, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1972

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