Seiko Cal. 4578 - 576

This Spring Drive model from 1971 features a 38mm PVD Black case. Powered by the 4578 caliber with 31j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-12cf34d6e443]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1971

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