A FINE LIMITED EDITION GOLD RECTANGULAR REVERSIBLE WRISTWATCH, Cartier, 'TANK BASCULANTE', NO. 9/365, CIRCA 1999

18k, circular rhodium plated lever movement, glucydur balance, silvered guilloche dial with Roman numerals, secret signature at VII, inner minute track, blued steel sword hands, reversible inner case engraved with the years 1999, 2000, 2001 on the back, polished rectangular outer case engraved with interlaced "Double C" Cartier ciphers inside, opening lip at 12 set with sapphire cabochon, case, dial and movement signed, with an 18k yellow gold Cartier deployant buckle.   

This watch was produced in a limited series of only 365 pieces especially to commemorate the millenium in 2000, the present example being offered at auction is numbered 9.