Seiko Cal. 5645 - 660

This Quartz model from 1981 features a 35mm Hardlex-Coated Steel case. With its 22mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-072515d096f4]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1981

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