Seiko Cal. 6640 - 433

This Hand-Winding model from 1966 features a 43mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 23j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-6544ce30a859]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1966

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