Seiko Cal. 6646 - 627

The Seiko 6646-627 represents an important milestone in Seiko's 1968 lineup. Powered by the 6646 caliber with 17j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-79c68047eaa8]

Also known as: Rally, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1968

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