Seiko Cal. 6643 - 666

The 6643-666 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-a94bcb5448aa]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1978

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