The short answer
For most buyers, no. A fake Patek Philippe 3700 will not hold value, Patek Philippe will not service it, and you cannot sell or ship it as a real watch in the United States without breaking federal law. No replica maker has reproduced the original movement or the exact bracelet geometry, so what you get is the silhouette and the logo, not the watch.
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It can be worth the money in three narrow cases:
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- You want the 1970s steel sports look on your wrist and you accept there is no resale market.
- You treat it as a costume or display piece and never present it as a real Patek Philippe.
- You buy a top-tier build at a price that matches the movement inside, not the name on the dial.
What the 3700 actually is
The reference 3700/1A is the original Nautilus, launched in 1976 with a case designed by Gerald Genta. It measures about 42 mm across, sits thin on the wrist, and carries an integrated steel bracelet that flows into the case without traditional lugs. The movement is an ultra-thin automatic built on the Jaeger-LeCoultre 920 base. Collectors call it the Jumbo. Every one of those traits is hard to copy, and the bracelet is the hardest part of all.
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What you are really paying for
Price on a replica 3700 falls into rough bands. Understand what each band buys:
- Under $150: a plated case, a stamped dial, and a quartz or basic automatic movement. Expect the finish to wear through in months.
- $250 to $500: a solid automatic movement, better dial printing, and a bracelet that mostly matches the case finish.
- $600 and up: a clone-style or Swiss automatic movement, closer case brushing, and a dial with correct date window placement.
The jump from the cheap band to the middle band is where most of the value sits. Past the middle band, you are paying for small details only a collector would notice, and you are paying a large share of the cost of a used entry-level Swiss watch.
Quality checkpoints before you pay
- Check the bracelet taper. The original narrows toward the clasp; most replicas stay wide and feel heavy.
- Look at the date window. It should sit at 3 o'clock and frame the date without a gap.
- Inspect the brushing. Case top should be brushed, bezel sides polished, with a clean line between them.
- Ask which movement is inside. If the seller will not name it, walk away.
- Ask for a video of the seconds hand sweep and the date flip at midnight.
- Confirm the case back markings. A correct 3700 back is plain steel with a reference engraving, not a display crystal.
Running costs to plan for
- Servicing: a local watchmaker, not a Patek Philippe service center. Budget $80 to $200 per service.
- Replacing the bracelet or clasp when the plating fails, often the first part to go.
- Water resistance: assume none past splashes regardless of what the case back claims.
- Seizure risk: customs can hold or destroy the package, and you lose the money.
Who should skip it
Skip it if you want a watch you can resell, insure, or hand down. Skip it if you plan to trade it as an original, because trafficking in counterfeit goods is a federal offense and buyers do report sellers. Skip it if the price creeps past a few hundred dollars, since that money buys a real Swiss watch with a real service history. Buy it only if the look is the whole point and you can afford to write off the cost.