Seiko Cal. 6657 - 458

This Quartz model from 1981 features a 44mm Hardlex-Coated Steel case. With its 18mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-366ee21540ff]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1981

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