Seiko Cal. 4577 - 231

The Seiko 4577-231 represents an important milestone in Seiko's 1974 lineup. With its 19mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-0c57d24afd3f]

Also known as: Bellmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1974

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