Patek Philippe. A fine and rare stainless steel anti-magnetic wristwatch
"Amagnetic", Ref. 3417A, movement no. 732818, case no. 2633185, retailed by Gübelin, 1960's
18-jewel fully adjusted cal. 27-AM 400 movement stamped twice with Geneva seal, gold lever escapement and gyromax balance free sprung with overcoil, metal dust cover, silvered dial, signed "Amagnetic", with applied baton numerals, subsidiary seconds, polished hands, within a monogrammed, circular screw back case, leather strap with steel buckle. 35mm diam.