17. 17Y Cartier. A fine rectangular 18K white gold automatic calendar wristwatch Cartier. A fine rectangular 18K (750) white gold automatic calendar wristwatch. Model: Tank Américaine, Limited Edition No.37/50 Reference: 2521 Date: Circa 1990 Movement: 26-jewel Cal.500 MC automatic Dial: Guilloche engraved silvered, black Roman numeral hour markers, black inner minute track, date aperture at 6, blued steel pointed hands, centre seconds Case: Brushed and polished rectangular, back secured by 8 screws, cabochon set crown, No.772420CD Strap/Bracelet: Cartier tan brown alligator leather Buckle/Clasp: Signed 18K gold folding clasp Signed: Case, dial & movement Size: 27mm x 45mm Weight: 78,51g