Patek Philippe. An 18k Gold Wristwatch with Center Seconds Signed Patek Philippe, Genève, Ref. 2533, Movement No. 705'226, Case No. 691'528, Manufactured in 1956Cal. 27SC mechanical movement, 18 jewels, dust cap, silvered matte dial, applied baton numerals, center seconds, circular water-resistant-type case, screw back, case, dial, and movement signed34.5mm diam.