Seiko Cal. 6646 - 749

The Seiko 6646-749 represents an important milestone in Seiko's 1977 lineup. Powered by the 6646 caliber with 22j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-6407c73b5c9e]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1977

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