Seiko Cal. 6647 - 979

The Seiko 6647-979 represents an important milestone in Seiko's 1970 lineup. Powered by the 6647 caliber with 31j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-7afa7d800bf6]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1970

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