Consigned by a private collector the present ref. 3417 has never been offered in public before and is preserved in very good original overall condition.
Production of reference 3417 was launched in 1958 and ceased around 1970. It was Patek Philippe's first "Anti-Magnetic" wristwatch made in series, available exclusively in stainless steel. At the time of its introduction, the "Amagnetic" feature was a sign of excellence and consequently mentioned on the dial.
The first series were fitted with a cal. 12 AM 400 movement, as of 1960, the calibre 27 AM 400 was used until the models' discontinuation. Both are fitted with a gold or beryllium lever escapement and covered by a soft iron (permalum) cap. The caliber was originally designed to withstand up to 450 oersteds of magnetic strength, in other words, more than four times the level of magnetism needed to stop a standard watch.
For further details and illustrations of reference 3417 see: Patek Philippe Amagnetic, ref. 3417, MStanga, 2015, Patek Philippe Steel Watches by John Goldberger, pp. 342-349, Patek Philippe – The Authorized Biography, Nicholas Foulkes, 2016, pp. 212-215.