Seiko Cal. 0721 - 556

The 0721-556 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0721 caliber with 36j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-a102e35e58bd]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1983

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