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an image of a small gold clock on a white backgrounda small red box with a gold clock inside of ita small red box with a gold clock inside of ita small clock that is sitting on a tablea small clock that is sitting on top of a tablea close up of a wooden block on a white backgroundan image of a golden metal box on a white backgrounda small wooden box with a mirror on ita wooden box with a mirror on top of ita small clock that is sitting on top of a tablea cardboard box with a handle on ita close up of a gold colored electronic device on a white backgrounda red box with a gold clock inside of ita small red box with a gold clock inside of ita person holding a small gold watch in their handsomeone is holding a ring in their left hand with a mirror on ita person holding a small gold object in their handan image of a red box with a golden lock on ita small red box with a golden lock on itan image of a red box with a gold border on ita small red box with a lock on top of ita small red box with a gold decoration on it
Premium MARGAUX SERRANO MAISON DE VENTE

Estimate €8,000 - €12,000
Sale commission
Description
CARTIER MYSTERIOUS PRISM 1960s/1970s Miniature desk clock in 18K yellow gold, French-made, hallmarked EJ. Case: rectangular with fluted sides, concealed dial visible through a system of optical prisms, screw-down back, winding mechanism on the case back. Dial: white, with Arabic numerals and painted minute track, blued steel sword-shaped hands. Movement: mechanical, hand-wound Dial and case signed. Numbered 035274, Dimensions: 2.8 x 1.7 x 1.7 cm. Gross weight: 42.88 g Includes: original signed presentation box. The patent for the prism clock was filed in 1937 by Gaston Cusin, a watchmaker who had notably collaborated with Maurice Coüet. This ingenious system, in which the clock’s dial is reflected by two mirrors, is largely inspired by the naval periscope. Depending on the angle from which the clock is viewed, the dial appears or disappears, thereby creating an optical illusion. Condition report Very good overall condition, minor scratches from normal use Slight traces of tarnish on the case The movement was functioning at the time of the appraisal, though no guarantee is given regarding its long-term reliability. The clock has probably never been opened and has been preserved in its original state.
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About the sale Art Nouveau / Art Deco Collection – Gallé and Daum glassware, paintings, furniture
Auction location
Auction time 10/06/2026 at 11:00 AM
Pictures credits:
Margaux Serrano Auction House
See original version (French)
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