Seiko Cal. 6643 - 491

The 6643-491 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-0bd77187cb1f]

Also known as: Silverwave, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1991

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