Seiko Cal. 5657 - 723

This Spring Drive model from 1978 features a 40mm Hardlex-Coated Steel case. With its 22mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-c6a18e92c0e2]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1978

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