A replica Patek Philippe 3700 is a copy of the original Nautilus Jumbo, the steel sports watch Patek Philippe introduced in 1976. A copy is worth buying only if it matches the original in four areas: a wide, thin two-part case with the porthole silhouette, an integrated bracelet that flows into the case without a gap, a slim automatic movement, and a grooved dial with applied markers and clean printing. When any one of those four is off, the watch stops reading as a Nautilus.

What the Patek Philippe 3700/1A Is

Reference 3700/1A was the first Nautilus. Gérald Genta drew the case as a porthole with a hinge-shaped shoulder on the left side, and Patek paired it with an integrated steel bracelet and a very thin automatic movement. The watch measured roughly 42 mm across and only about 7.6 mm thick, which is why collectors call it the Jumbo. Original dials have horizontal grooves, applied baton markers, and a small date window at three o'clock. Later Nautilus references, including the 5711, changed the proportions and the thickness, so a replica of a 3700 should look flatter and wider on the wrist than a replica of a 5711.

What to Check on a Replica Patek Philippe 3700

Case and bracelet proportions

The case should be wide and thin, with a flat bezel that follows the porthole outline. Check the transition where the bracelet meets the case. On a good replica the first link sits flush and the taper runs smoothly toward the clasp. On a weak copy there is a visible step, or an uneven gap on one side that no amount of polishing hides.

Dial and hands

  • Horizontal grooves should be evenly spaced and consistent in depth across the whole dial.
  • Applied markers should sit level and catch light along the full length of the baton.
  • Printing should be sharp and centered, with no blur around the logo or the depth rating.
  • Hands should be thin and flat, with a clean sweep and a correctly sized date window.

Movement and winding feel

A thin automatic movement matters for two reasons: it keeps the case slim, and it gives the seconds hand a smooth sweep. Ask what movement the replica uses and whether it is a clone of a Swiss design, a Japanese automatic, or a quartz unit. A quartz version will often be thinner than it should be, and the seconds hand ticks once per second instead of sweeping.

Crystal, crown, and finishing

The crystal should be flat sapphire or a close substitute with no blue haze at the edges. Brushed surfaces should run in one direction, and polished bevels should be crisp where the two meet. The crown should sit tight against the case without a gap or wobble.

Tells That Give Away a Cheap Copy

  • Case width under 40 mm, or a case that is too thick for the bracelet width.
  • Bracelet links that rattle, or a clasp that flexes when you press it.
  • A dial with shallow, uneven grooves or markers that look glued on.
  • Sharp edges on the underside of the case where the original is softly finished.
  • Lume that glows bright green when the original tone is warmer.

Automatic vs Quartz Replicas

Automatic replicas cost more and need occasional servicing, but they keep the correct case profile and the smooth seconds sweep. Quartz replicas are cheaper and easier to live with, and they suit buyers who want the look without the maintenance. If you plan to wear the watch often and care about how it feels on the wrist, an automatic version of the replica Patek Philippe 3700 is the more convincing choice.

Size, Fit, and Daily Wear

The 3700 wears wide but light, because the case is thin and the bracelet tapers. Measure your wrist before ordering and confirm how many removable links the bracelet includes, since some replicas ship with a fixed length. Integrated bracelets are difficult to swap, so a leather strap is rarely an option without an adapter.

Legal and Practical Notes

A replica is not a genuine Patek Philippe, and selling counterfeit watches is illegal in many countries. Treat a replica as a fashion watch, expect no resale value, and do not pay genuine-watch service prices for repairs.

FAQ

Is the 3700 the same watch as the Nautilus Jumbo?

Yes. The 3700/1A is the original Nautilus, and collectors call it the Jumbo because of its wide, thin case.

What movement should a good replica use?

A thin automatic movement, ideally one built to the same dimensions as the original calibre so the case keeps its slim profile.

Will a replica Patek Philippe 3700 hold value?

No. Replicas are decorative items and do not appreciate the way genuine watches can.