Cartier. A fine and rare platinum limited edition square wristwatch

Cartier. A fine and rare platinum limited edition square wristwatch
Signed Cartier, Paris, Santos Dumont, Mecanique, no. 57/90, ref. 1575-1, case no. C 71406, manufactured in 1994
Cal. 21 nickel-finished lever movement, 17 jewels, pink matte dial, Roman numerals, secret signature at VII, blued steel moon-style hands, outer railway minute divisions, square case, riveted bezel, back secured by four screws in the band, cabochon sapphire-set crown, 18K white gold Cartier deployant clasp, case, dial and movement signed
27 mm. wide