Brand Patek Philippe, Geneva Model - Retailed by / made for - Year circa 1938 Reference 528 J Movement No. 832 806 Calibre 9-90, manual-winding, 18 jewels Case No. 615 752 (by Ponti, Gennari & Cie, Geneva) Material/s yellow gold (18-carat) Bracelet leather strap Buckle Aftermarket gold coloured metal pin buckle Dimensions 40x 29mm Thickness 7mm Length - Weight 38.22gr. (approx.) Signature dial, case and movement Accessories Extract from the Archives Patek Philippe Ref. 528 J, Art Deco, unusual triangular-shaped lugs, silver dial; yellow gold (18-carat) -- A highly unusual Art Deco wristwatch reference, one of only five known -- Yellow gold (18-carat), manual-winding, vertical rectangular-shaped, Art Deco, gentleman’s wristwatch, with subsidiary seconds at 6 o’clock and unusual triangular-shaped lugs. -- Case: two-piece, polished, rounded ‘tubular’ bezel and lugs intertwining, the latter forming a sort of triangular shape, snap-on case-back; polished crown. Dial: silver colour, with yellow gold applied suspended Arabic number 12 and square-shaped indexes, the numbers 3 and 9 lapidated in the shape of a pyramid, external minute track divided five by five with black painted radiating lines; yellow gold ‘Feuille’ leaf- shaped hands. Movement: calibre 9-90, manual-winding, 18 jewels, rhodium-plated with ‘fausses côtes’ decoration, going barrel, straight-line lever escapement, cut bimetallic compensated balance with gold poising screws, blued steel hairspring with terminal curve, polished steel index-regulator, adjusted to heat, cold, isochronism and 5 positions. -- The Extract from the Archives, dated February 05, 2025, mentions that this watch was made in 1938 and sold on January 31, 1940.
