Seiko Cal. 6646 - 672

The Seiko 6646-672 represents an important milestone in Seiko's 1979 lineup. Powered by the 6646 caliber with 20j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-5315d152e396]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1979

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