Seiko Cal. 4577 - 251

This Spring Drive model from 1979 features a 43mm Hardlex-Coated Steel case. With its 22mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-ac7abbcc4271]

Also known as: Rally, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1979

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