Seiko Cal. 4577 - 540

This Spring Drive model from 1976 features a 35mm Hardlex-Coated Steel case. Powered by the 4577 caliber with 20j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-28c7c49cc8e5]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1976

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