Cartier. A fine and rare 18K gold plated rectangular curved wristwatch

Cartier. A fine and rare 18K gold plated rectangular curved wristwatch
Signed Cartier, Tank Allongée model, case no. 21'612/2'442/271, circa 1960
Mechanical movement, 17 jewels, white matte dial with Roman numerals, inner railway minute divisions, rectangular curved case, sapphire-set crown, snap on back, case, dial and movement signed, case hand stamped with Cartier reference numbers
50.7 mm. overall length