Seiko Cal. 4581 - 420

This Hand-Winding model from 1980 features a 40mm PVD Black case. Powered by the 4581 caliber with 19j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-a4fd5305ad5b]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1980

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