Seiko Cal. 0721 - 650

This Spring Drive model from 1967 features a 43mm Hardlex-Coated Steel case. Powered by the 0721 caliber with 19j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-051899b0d2ef]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1967

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