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A picture and description of a similar watch ... ?
Patek Philippe & Cie, Genève, No. 880295,case No. 517120, circa 1940.Fine 18K gold, keyless dress watch.C.Three piece, massive, "variée carrure plate", engine-turned in a striped pattern. D. Black lacquered with applied gold indexes and sunk subsidiary seconds. Gold "dauphines" hands. M. 17''', rhodium plated, "Fausses côtes" decoration, with the Geneva quality marks, 18 jewels, straight line lever escapement, cut bimetallic balance, Breguet balance spring with swan neck micrometric index.Signed on the dial, case and movement.Diam. 45 mm.
This is a description for a pocket watch patek ref. 600 with what i believe will be the same material applied on dial....most patek watches uses gold as a base. Base on the picture you have provided, i think "lacquered" is the material applied on top, enamel and porcelain has a much more shine and more glossy finishings.
Another model very similar to your dress watch, is a patek ref. 707.
Patek ref. 600 with YG case and black dial 
Not too sure if the above will help
Can somebody help?
A picture and description of a similar watch ... ?
