Seiko Cal. 4539 - 631

This Spring Drive model from 1970 features a 45mm Hardlex-Coated Steel case. Powered by the 4539 caliber with 33j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-778c03915ef2]

Also known as: Shogun, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1970

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