Short answer

The term "fake drive 42mm gold" mixes three ideas. Fake means replica. 42mm is a case diameter. Gold is a metal or a coating. No current watch model carries the name Drive at 42mm. Cartier sells a Drive line, but it is smaller and built for dress wear. A person who searches this term wants a 42mm replica with a gold case or a gold-tone case. Two groups fit: gold dive watches and gold sports watches.

Real 42mm gold models

  • Rolex Sky-Dweller, 42mm, in yellow gold, white gold, and Everose gold.
  • Rolex Yacht-Master 42, white gold case.
  • Omega Seamaster Diver 300M, 42mm, in steel and gold and in full gold.
  • Audemars Piguet Royal Oak Offshore, 42mm, in yellow gold and rose gold.
  • Breitling Superocean 42, in steel and gold two-tone.

Replica factories copy all five. The Sky-Dweller and the Royal Oak Offshore appear most in gold listings.

What the gold is

Three builds exist.

  1. Electroplated steel. A thin layer of gold, 2 to 5 microns, sits on a steel case. Color looks close to 18k at first. It rubs off at the crown, the lugs, and the caseback edge.
  2. PVD or IP coating. Titanium nitride or a gold-alloy coating, about 1 micron. Harder than plating. Color runs lighter and greener than 18k yellow gold.
  3. Solid 18k gold case. Rare in the replica market. Price lands above $3,000. Weight and color match real gold. Most sellers do not stock it.

The World Gold Council states 18k gold is 75% gold by weight. A plated case holds no gold by weight past the surface layer.

Weight

A 42mm steel replica on a bracelet weighs 150g to 180g. A solid gold case of the same size weighs 200g to 260g. Gold is denser than steel, so a gold watch feels heavier in the hand. A plated watch feels like steel because the core is steel.

Movements

Most 42mm gold replicas run one of these:

  • Asia 2824 or 2836 clone, 28,800 vibrations per hour, 38 to 42 hours of power reserve.
  • Clone 3235, sold with a claimed 70-hour reserve. Measured reserve lands lower.
  • Seiko NH35, 21,600 vph, low cost, easy to service.
  • Miyota 9015, 28,800 vph, thin, common in dress models.
  • A7750 clone for chronograph models such as the Royal Oak Offshore.

A regulated clone keeps time to about -10 to +15 seconds per day. That band is wider than a COSC certified movement.

Checks before you pay

  1. Measure the case with calipers. 42mm means 42.0mm, plus or minus 0.3mm.
  2. Measure lug width. Gold sports models use 21mm or 22mm lugs in most cases.
  3. Ask for plating thickness in microns. A seller with no number has no answer.
  4. Compare crown color to case color. A two-tone mismatch shows in daylight.
  5. Compare the date window and cyclops position to photos of the real watch.
  6. Ask for a movement photo through the caseback.

Limits

No replica matches the metallurgy, tolerances, or hand finishing of the original. Gold plating on a daily-worn watch wears through in one to three years at contact points. Water resistance claims of 30m to 50m depend on gaskets and caseback torque, and most units ship with no test sheet. Prices run $180 to $600 for plated steel, $700 to $1,500 for thicker gold wrap, and $3,000 and up for solid gold cases.