Patek Philippe. A fine and rare stainless steel antimagnetic manual wind wristwatch Amagnetic, Ref:3417, Case No.2.618.261, Movement No.731.201, Manufactured 1961, Sold 14th February 1962

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Lot 91Y
Patek Philippe. A fine and rare stainless steel antimagnetic manual wind wristwatch
Amagnetic, Ref:3417, Case No.2.618.261, Movement No.731.201, Manufactured 1961, Sold 14th February 1962

Sold for £ 56,250 (US$ 70,835) inc. premium
Patek Philippe. A fine and rare stainless steel antimagnetic manual wind wristwatch
Amagnetic, Ref:3417, Case No.2.618.261, Movement No.731.201, Manufactured 1961, Sold 14th February 1962
18-jewel Cal.27AM400 manual wind anti-magnetic movement adjusted to heat, cold, isochronism and 5 positions, Seal of Geneva, freesprung Gyromax balance wheel, matte silvered dial with applied baton hour markers and Arabic numeral 12, black outer minute markers, polished pointed baton hands, subsidiary dial at 6 for constant seconds, brushed and polished round case with screw down back, soft-iron protection cap, signed crown, fitted Patek Philippe black leather strap with polished buckle, together with Extract from the Archives, case, dial and movement signed
35mm.

Footnotes

  • In the 1960s, scientific experiments and normal industrial activity was bringing people into contact with magnetism in a way that had not been experienced before. Watches have many components in them that are normally susceptible to magnetism, which has a severely detrimental effect on time keeping. Even the humble fridge with its magnetic seal around the door or a large speaker with its huge electro magnetic coil can have an affect. So in the industrial and scientific community there was a need for a watch that was resistant to magnetism. The Amagnetic watch was born in this era for the specific purpose of anti-magnetism. The reference 3417 is a "tool watch", a purpose specific watch, which is very unusual for Patek Philippe.

    The Patek Philippe Reference 3417 was the first anti-magnetic watch produced in series and was introduced to the world in 1958. In 1960 the original calibre 12-400 was replaced by calibre 27-AM400 with improved timekeeping and anti-magnetism. This was made until 1969 changing the balance frequency from 18000A/h to 19800 A/h with a bronze beryllium straight-line lever escapement and Gyromax balance wheel. The serial numbers for this calibre are from 730000 to 735239 and 739700 to 739799.

    With regards to the Magnetic field test report from Patek Philippe, the reference 3417 is made for preventing strong electromagnetic inference up to 450 oersteds. The report also stated that it would take a magnetic field of 1200 oersteds to stop the "Amagnetic" watch, and outside of such a field, the watch will run again and will gain approximately 30 seconds in 24 hours. A process of demagnetizing will eliminate this gain. At the time of production, Patek Philippe offered on special request a movement that would be manufactured with a double shielding, to offer additional protection against strong magnetic fields. The result was known to be the best in the period.

    See 'mstanga', Patek Philippe ref. 3417 Amagnetic guide, August 2015
Contacts
Patek Philippe. A fine and rare stainless steel antimagnetic manual wind wristwatch Amagnetic, Ref:3417, Case No.2.618.261, Movement No.731.201, Manufactured 1961, Sold 14th February 1962
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