Quick Answer

A fake Patek Philippe 3445 is rarely a factory-built clone. The reference 3445 is a vintage watch made from 1961 into the 1970s, and no modern replica factory sells a faithful copy of it. What circulates instead are franken watches: old or rebuilt cases and dials fitted with the wrong movement, redialed originals, and counterfeit cases shaped to imitate the 1960s original. The three places a fake reveals itself are the movement, the caseback stampings, and the dial printing.

What the Real 3445 Looks Like

The 3445 was Patek Philippe's first serially produced automatic wristwatch with a date. That fact drives everything about how you check one.

  • Production ran from 1961 into the 1970s.
  • Case diameter is about 35 mm, a normal size for the period.
  • Cases are gold: yellow, pink, and white. Platinum pieces are rare.
  • The movement is the caliber 27-460 M, an integrated automatic with a date mechanism.
  • The caseback is a screw type, stamped with reference and serial numbers.
  • Dials are simple Calatrava style, with applied gold indexes, baton or feuille hands, and a date window at 3 o'clock.

Before You Start

You need a 10x loupe, calipers, a caseback wrench, and clear photos of known genuine examples for side-by-side comparison. Get written permission from the seller before any caseback is opened. Buying or selling counterfeit branded watches is illegal in the United States, so treat this guide as identification training.

How to Check a 3445 Step by Step

  1. Request photos of the movement, the caseback interior, and the dial before you travel to see the watch.
  2. Measure the case across the bezel with calipers. A genuine 3445 sits near 35 mm, and a stretched or polished counterfeit case often falls outside that range.
  3. Open the caseback with the seller's permission and read the movement engraving. It should show caliber 27-460 M, and the finish should be fine, with Geneva stripes applied by hand.
  4. Compare the movement number to the number stamped on the caseback interior.
  5. Study the caseback exterior stampings. Reference and case numbers are stamped, not laser etched, and the depth is even.
  6. Examine the dial under the loupe. Look at the brand signature, the applied indexes, and the edge of the date window.
  7. Check the date font and alignment. The numeral should sit centered in the window with even spacing on both sides.
  8. Look for hallmarks on the case, lugs, and buckle, and confirm the metal matches the advertised gold color.
  9. Run the watch for 24 hours on a winder and confirm the date changes at midnight, not hours before or after.

Movement Red Flags

  • A rotor or bridge marked with any caliber other than 27-460 M.
  • A thin, low-grade automatic movement from a mass producer with a date at 3 o'clock.
  • Finish that is too bright and too uniform, with machine-cut stripes instead of hand-applied ones.
  • Movement numbers that are missing, drilled out, or restamped on top of older marks.
  • A date mechanism built as a bolt-on module rather than integrated into the base caliber.

Dial and Case Red Flags

  • Printing that sits slightly high or low on the dial, or letters with uneven thickness.
  • Applied indexes that are glued rather than pinned, with visible adhesive at the base.
  • A dial that is too glossy or too flat compared with period examples.
  • Polished lugs that have lost their original bevels, which hides a swapped or recut case.
  • Caseback engraving with the wrong letter shapes or shallow, cast-looking text.
  • A crown that is not signed or that sits proud of the case.

Price Reality Check

Genuine gold 3445 examples trade in the low five figures at auction, and the number moves with the metal, dial type, and condition. If a seller offers a complete, working 3445 for a few hundred dollars, the watch is not what it claims to be. Franks often sell for a fraction of genuine value, and the sellers describe them as "restored" rather than fake. Ask what was replaced and get the answer in writing.

Bottom Line

There is no accurate modern replica of the 3445, so most bad examples are franken watches using real cases with wrong parts. Focus your inspection on the caliber 27-460 M, the caseback stampings, and the dial print. If any of those three does not line up, walk away.