Patek Philippe's first series-produced antimagnetic wristwatch, and sold only in stainless steel at a time when almost everything else in the catalogue was precious metal. The movement sits inside a soft-iron inner case, behind a screw-down caseback rather than the snap-back the maker normally used. Period marketing pointed it at people who worked around magnetic fields — X-ray technicians, physicists, engineers. Collector estimates put total production in the low hundreds.
Reference record
Production
1958–1972
Model
Amagnetic
Case material
Stainless Steel
Case size
35mm
Movement
Manual
Calibre
Cal. 27 AM 400
Dial colours
Silver / White
Market value band
$18k – $45k
Timeline
1960The calibre changes to the 27-AM 400, adding a Gyromax balance and further antimagnetic components in the escapement
Notable
—35mm stainless steel case. The reference was never offered in gold; the gold antimagnetic Pateks of the period are the 2570 family.
—Escapement components, including the lever, are gold rather than steel, so they cannot be magnetised.
—The word 'Amagnetic' is printed on the dial beneath the Patek Philippe signature.
What the specification implies
—The specification calls for a screw-down caseback rather than the snap-on back used across most Patek Philippe references of the era.
—Opening the case does not expose the movement directly — a soft-iron inner cover sits between the caseback and the calibre.
—Two movement generations exist: the 18-jewel 12'''400 AM on the earliest examples, and the 27-AM 400 with Gyromax balance from 1960.
—The layout is a large sub-seconds register at six o'clock with applied baton indices; there is no centre seconds hand.
Common questions
When was the Patek Philippe 3417 produced?
The 3417 was produced from 1958 to 1972.
What movement does the Patek Philippe 3417 use?
The Patek Philippe 3417 runs the Cal. 27 AM 400, a manual movement.
How do I check a Patek Philippe 3417 with Watch Safe?
Look up the watch's serial number in the Watch Safe registry to see whether a record exists or a theft flag is attached. A registry search identifies records for a specific serial; it does not authenticate the watch. Authentication is performed in person by an independent expert authenticator, and Watch Safe records and publishes the result.