Seiko Cal. 6646 - 279

The Seiko 6646-279 represents an important milestone in Seiko's 1968 lineup. Powered by the 6646 caliber with 30j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-40ece2bfe672]

Also known as: Sumo, Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1968

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