Cartier - a lady's Tank Francaise quartz wristwatch. Cartier - a lady's Tank Francaise quartz wristwatch, the square Roman numeral dial in a stainless steel case 20.4x18mm, with blue cabochon synthetic blue spinel to the eight sided crown, integral stainless steel and 18 carat yellow gold bracelet with double foldover concealed clasp, Model number 2384, serial number 1255656CD, with Cartier red box, no paperwork, authentification comes from a recent valuation for insurance, watch is running at present time although no guarantee is given.