Seiko Cal. 6643 - 851

The 6643-851 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6643 caliber with 24j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-11af8387f71c]

Also known as: Pogue, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1984

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