Patek Philippe. A Fine Platinum Automatic Wristwatch with Diamond-Set DialSigned Patek Philippe, Genève, Ref. 2551, Movement No. 763'052, Case No. 695'325, Manufactured in 1956Cal. 12-600 AT automatic movement, stamped with the Geneva Seal, 18k gold rotor, 30 jewels, silvered matte dial, diamond-set numerals, outer beady minute divisions, subsidiary dial for constant seconds, circular water-resistant-type case, stepped bezel and lugs, screw down case back, case, dial, and movement signed36mm diam.