Quick answer
A fake Cartier Tank "830107" is a replica that carries a reference stamping buyers associate with a vintage-proportioned Tank case. The number alone authenticates nothing. Counterfeiters engrave plausible references on plated and steel cases, and Cartier reference numbers shift by era, market, and case metal. Judge the watch by the case, dial, crown, movement, and paperwork, then treat the reference as one data point.
fake cartier tank 830107 model
What the 830107 reference covers
Listings that use 830107 usually describe a small Tank with Roman numerals, a cabochon crown, and a gold-plated or steel case. That profile matches several Cartier eras, so the number cannot settle the question by itself. Cartier reference data lives with Cartier, not with sellers. Ask for the caseback photo and the service paperwork, then verify the reference against Cartier documentation before you pay.
How fakes reach buyers
Replica Tanks move through social sellers, marketplace listings with stock photos, and sites that call a watch a "first copy" or "1:1." Most problems start with the listing, not the watch:
fake cartier tank 830107 model
- Photos that reuse an official campaign image instead of the actual watch.
- Reference numbers copied from a genuine listing but stamped on a different case shape.
- Prices far below the going rate for the same reference in the same condition.
- Sellers who refuse a caseback photo, a movement photo, or a video call.
Step-by-step inspection
- Request a straight-on photo of the caseback under raking light, then compare the engraving depth, font, and spacing with known Cartier examples.
- Measure the case with calipers at the 12 to 6 line and at the 3 to 9 line, then compare the numbers with the reference you were quoted.
- Inspect the dial with a 10x loupe: check Roman numeral crispness, the secret signature in the VII, and the print edges on the minute track.
- Examine the crown for the cabochon shape, color, and setting depth, then confirm it winds and sets without grit.
- Look at the lugs and case edges for plating seams, soft corners, or polishing marks that do not match the stated condition.
- Ask for a movement photo with the caseback removed, then check the caliber shape, finish, and any stamping against the era you were quoted.
- Read the paperwork for matching serials, dates, and service stamps, then call the numbers back to the seller to confirm the story.
Listing red flags
- The seller calls the watch "AAA" or "mirror quality" and avoids the word replica.
- The caseback reference and the paperwork reference do not match.
- The listing shows a gold watch but the caseback photo shows steel or plating wear.
- The seller offers no return window and pushes a deposit by message app.
- The price undercuts every comparable listing by a wide margin.
What a premium replica can deliver
A good 1:1 replica can match case dimensions, dial layout, and outward finish at arm's length. It cannot match Cartier's movement finishing, precious-metal hallmarks, or service history. Plated replicas wear through at the lugs and caseback edges, and the plating cannot be repaired the way solid gold can. Buy a replica as a replica, not as an investment, and expect independent servicing to be hard because parts do not interchange with genuine Cartier components.
Legal and resale notes
Counterfeit watches violate trademark law in the U.S., and selling one as genuine is a deceptive practice. A replica sold openly as a replica still carries resale limits: auction houses and most dealers will not touch it, and resale value drops to the price of the case and movement. Keep the listing description, payment record, and photos if you buy, and disclose the replica status in any later sale.