Patek Philippe first launched their new series of watches in 1985 introducing the Ref. 3940 and Ref.3941 models. 

Very soon, the reference number of this model was standardised to Ref. 3940, sold either with one or two screwed backs;

one of these backs could be a screwed metallic back, while the second, (non-compulsory), a screwed sapphire crystal back. 

The 3941 model represents the first exhibition caseback produced by Patek Philippe it is an extremely rare example

that is now discontinued.

During the first year of production Patek Philippe produced the glass back with the Ref 3941 and solid case back in the Ref 3940 after the first year the reference was consolidated to the 3940 hence leaving very  few Ref 3941’s in existence 

It features a cal. 240Q mechanical automatic movement, stamped with the Poinçons de Genève, rhodium plated, “fausses côtes” decoration 27 jewels, lever escapement, Giromax balance adjusted to heat, cold isochronism and 5 positions, shock-absorber, self-compensating flat balance-spring, mobile stud bearer, 22ct gold micro-rotor mounted on ball bearings and is presented on a black alligator strap with an 18ct gold Patek Philippe buckle. 

Case: Three-body, solid, polished, concave bezel, transparent back. 

Here’s your best chance today to own one of the world’s finest complications ever produced by the world’s leading maker, this watch is accompanied by its original papers and a report by Sotheby’s European Watch Department.