Quick answer
The number 162367 does not match any Cartier model code for the Santos. Cartier uses four-digit case numbers on vintage Santos Galbee and Santos Dumont models, and W-prefix codes such as WSSA0009 on current Santos de Cartier models. Sellers attach 162367 to replica listings as a stock number or a caseback batch code. Treat it as a seller identifier, not a Cartier reference.
How to check a Santos against a real one
Case and bezel
Genuine Santos cases are cut from steel with a brushed top and polished flanks. The bezel screws sit in countersunk holes. On many fakes the screw slots are stamped into the metal and do not turn. Real screws have visible slot depth and line up with the caseback screws.
Dial and hands
Cartier prints the Roman numerals in a serif face. The "Swiss Made" mark sits at 6 o'clock below the minute track. Replica dials show thick print, uneven numeral spacing, and glossy paint on the numerals. Some Santos dials carry a hidden "Cartier" inside one numeral. That feature changes by year, so it is not a reliable test on its own.
Bracelet
The Santos bracelet uses a screw-linked system. Each link has a slotted screw head on one side. Fakes use push pins with screw heads molded on. Check for play between links and for burrs around the screw holes.
Movement
Santos 100 models from 2005 to 2018 used Cartier caliber 049, based on the ETA 2892-A2. It runs at 28,800 vibrations per hour with a 42-hour power reserve. The 2018 Santos de Cartier uses the in-house 1847 MC. Replica Santos watches use a Sea-Gull ST2130, a Miyota 9015, or a quartz module. A quartz second hand ticks once per second. A mechanical second hand sweeps in small steps.
Caseback and papers
Genuine casebacks carry the reference, the case serial, and a model stamp. The serial and the reference must match the papers. Replica casebacks often repeat one serial across a batch. Look at engraving depth. Laser engraving looks shallow and flat.
Price context
A steel Santos de Cartier large model lists near $7,000. Used Santos 100 watches trade between $3,500 and $5,500. Replica sellers ask $200 to $500 for automatic copies and $80 to $150 for quartz. A price far below the used market is a signal.
Legal note in the US
Importing a counterfeit watch into the United States violates 19 U.S.C. 1526. CBP can seize the shipment and destroy it. Selling counterfeits can bring criminal charges under 18 U.S.C. 2320, with a first-offense maximum of 10 years.