Short answer
830107 is not a Cartier model name. It turns up in listings and on case backs of older Tank and Must de Cartier Tanks, where it works as a case or batch code rather than a family name. Sellers who tag a watch as part of a "fake Cartier Tank 830107 collection" are usually describing a replica built to resemble those older Tanks, most often the vermeil Must versions sold in the 1970s and 1980s. The number alone tells you almost nothing. What decides whether the watch is worth your money is the case material, the dial printing, the crown, and whether the movement fits the era the watch claims to come from.
fake cartier tank 830107 watch
Where the number shows up
On vintage Tanks, the inside of the case back usually carries a reference or case number plus a serial, and sometimes a maker's mark from the case supplier. The number a seller quotes in a title is often pulled from whichever stamp is easiest to read, which is why the same watch can appear under two or three different "reference" numbers across listings.
- Case back stamps, usually inside the lid on a snap-back or on the outer back of a screw-back.
- Paperwork and hang tags, which are easy to reproduce and carry little weight.
- Auction catalog entries, which help you date a case shape but not a specific number.
If a seller treats 830107 as proof of a model, treat that as a warning sign rather than a selling point.
Fake Cartier Tank 830107 Price: What Buyers Should Know
What I check on a replica in this style
Case and plating
Most Tanks in this era used vermeil: sterling silver with a thick gold layer. Rub the edges and the back of the lugs. Worn plating shows dull silver or copper tones at the corners, which is normal on a 40-year-old watch and suspicious on one sold as new. Also check the weight. Silver-cased Tanks feel denser than the brass-bodied replicas that copy them.
Dial and printing
The roman numerals should sit on a clean baseline with even strokes. Look at the minute track: on good dials the lines are thin and stop short of the numerals. On cheap replicas the printing looks thick, and the "VII" or "XI" often leans. A magnifier helps here more than any spec sheet.
Crown and cabochon
The crown should be a sapphire or spinel cabochon set in gold, not a glued glass bead. Run a fingernail around the edge. If it flexes, it is glued. On Tanks the crown is also slightly recessed into the case, and replicas often leave it sitting proud.
Movement
Ask for a clear photo of the movement and the case back interior. A quartz replica will not match a watch presented as a vintage mechanical piece, and a hand-wound movement with rough finishing usually points to a modern reproduction rather than an old one.
Price and paperwork
Replica Tanks in this shape generally sell for a small fraction of an original, and prices swing with strap quality and box contents. Original boxes, booklets, and service papers are widely copied, so weigh them lightly. Condition and movement carry more value than accessories.
Legal reality
Counterfeit watches cannot be legally imported into the United States, and shipments can be seized. Selling a watch as authentic when it is not is fraud. If you are buying a replica knowingly, keep the transaction domestic, keep your receipts, and do not resell it as the real thing.