Seiko Cal. 6643 - 661

This Hand-Winding model from 1974 features a 45mm Hardlex-Coated Steel case. Powered by the 6643 caliber with 21j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-ab475ed39e2f]

Also known as: Panda, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1974

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