Seiko Cal. 0721 - 983

The Seiko 0721-983 represents an important milestone in Seiko's 1971 lineup. Powered by the 0721 caliber with 18j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-f144f0a32034]

Also known as: Monster, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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