Seiko Cal. 4578 - 641

This Spring Drive model from 1966 features a 45mm Stainless Steel case. Powered by the 4578 caliber with 36j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-052aa16a4e07]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1966

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