Patek Philippe Ref. 3445 Yellow Gold Patek Philippe, Genève, movement No. 1117065, case No. 326842, Ref. 3445. Made in the 1960s. Fine, self-winding, water-resistant, 18K yellow gold wristwatch with date and an 18K yellow gold integrated Patek Philippe mesh bracelet. Notes Production of the Ref. 3445 started in 1961.