Seiko Cal. 6645 - 722

The Seiko 6645-722 represents an important milestone in Seiko's 1979 lineup. Powered by the 6645 caliber with 30j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-354ce73b1f61]

Also known as: Rally, Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1979

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