Seiko Cal. 5657 - 765

This Quartz model from 1979 features a 39mm Hardlex-Coated Steel case. With its 20mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-79ca3f76d4b2]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1979

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