Seiko Cal. 6644 - 866

Released in 1966, the Cal. 6644 with design code 866 was part of Seiko's domestic market collection. With its 21mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-8256fb4adf53]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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