Short answer
"Fake Vacheron Constantin steel" covers two things. It can mean a counterfeit watch that copies a steel Vacheron Constantin, most often the Overseas. It can also mean a case made of a fake steel alloy plated to look like stainless steel. The first is checked on the movement, the caseback and the bracelet. The second is checked on the metal itself.
Real steel Vacheron Constantin models
Vacheron Constantin was founded in Geneva in 1755. The Overseas line began in 1996 with reference 42040. The third generation Overseas 4500V arrived in 2016. The case is 41 mm wide and about 11 mm thick. The movement is the in-house caliber 5100, automatic, with a 60-hour power reserve. The bezel has six notches cut in the shape of the Maltese cross. Retail on the steel Overseas with a bracelet is about $22,900 USD. Used steel Overseas watches sell between about $18,000 and $30,000. Industry estimates put annual production near 20,000 to 25,000 pieces across all lines, which is a small number for a brand at this price.
What the counterfeit market sells
Three tiers exist.
- $50 to $150. Quartz movement, plated zinc or brass case, printed dial, glued-on logo. Low weight. Wrong date font.
- $250 to $700. Automatic movement from Miyota, Seagull or an ETA 2824 copy. Caseback engraving is shallow. Bracelet screws are decorative.
- $700 to $1,500. Sold as a "super clone." Closer case shape, sapphire crystal, better dial print. The movement is still not in-house.
How to check a steel Overseas
Movement
Genuine: caliber 5100, 22k gold rotor, Maltese cross cut into the gold, Cotes de Geneve stripes, Geneva Hallmark stamped on the movement. Fakes: brass rotor with laser etching, no hallmark, wrong jewel count, wrong beat rate. The rotor is the fastest tell. Gold is dense, so a gold rotor has more heft in the hand than a plated copy of the same size.
Case and caseback
Overseas reference numbers follow the format 4500V/110A-B128. The same number is stamped on the caseback and on the outside of the case between the lugs. Engraving on a real case is cut into the metal. It is not printed. The sapphire caseback ring carries the model name and the words Swiss made. Fake engraving sits shallow and the letters have rounded edges.
Bracelet and clasp
The third generation Overseas bracelet uses half Maltese cross links. The quick release system swaps the bracelet for a strap with no tools. The clasp is a folding buckle with the maker name cut into the metal. On copies, the release buttons bind and the end links do not sit flush with the case.
Fake steel as a material
Genuine Vacheron Constantin cases use 316L stainless steel, also called surgical steel. Density is about 8.0 g/cm3. Zinc alloy in cheap copies runs about 6.6 to 7.0 g/cm3, so a zinc case of the same size weighs less.
- Chrome plating on zinc wears through at the lugs and crown. The metal under it is gray and darkens in sweat.
- 304 stainless steel appears on some mid tier copies. It resists corrosion less than 316L and pits around the caseback gasket.
- A magnet is not a test. Austenitic 316L and plated brass both show little or no pull.
Serial numbers and paperwork
Vacheron Constantin does not run a public serial lookup. The Geneva headquarters and authorized service centers can confirm a reference and movement number. An Extract from the Archives is available for older watches and lists the date of manufacture and the original retailer. Counterfeit listings often show a box, a booklet and a card with no matching number.
Price reality check
If a listing offers a steel Overseas with box and papers for $1,200, it is a copy. No wholesale channel sells new steel Vacheron Constantin watches below retail.