Seiko Cal. 0721 - 551

This Automatic model from 1981 features a 41mm PVD Black case. Powered by the 0721 caliber with 24j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-b6ff4d9ff708]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1981

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