CARTIER, Paris 1930s Exceptional "Mystery" Clock Probably a special order. Silver, marble, rhodonite marquetry, onyx, rock crystal. In portico-shaped, supported by two columns with octagonal section in onyx, the base and the body of the clock in rhodonite on a marble core, the octagonal-shaped dial in rock crystal underlined by black enamel. Roman numerals in silver to indicate the hours applied, hands with decreasing steps imitating the architecture of the Empire State Building. Original movement (unsigned) with single axis, eight days. Signed Cartier, Paris Hallmark of Maurice Couët Dimensions: 17.7 x 15 x 9.7 cm Gross weight: 2.667 g. Key reported later. Provenance: Former collection of Maurice Rheims Accompanied by a Certificate: No OBAC2103-1 by Olivier Bachet and Alain Cartier.