Seiko Cal. 6646 - 512

The Seiko 6646-512 represents an important milestone in Seiko's 1981 lineup. With its 20mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-65043bfd78e6]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1981

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