Swiss gold astronomic watch made for the Indian market Circa 1890

Gold double-dialled pocket watch
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A very fine Swiss, 18K gold hunting cased, double-dial, moon phases astronomical watch with calendar, circa 1890. Made for the Indian Market. A solid case, the spring-loaded covers chased with foliate decoration. White enamel dial on the front with radial Roman numerals, outer minute track and five-minute Arabic markers, sunk subsidiary seconds, large inner moon phase aperture. Blued steel spade hands. White enamel on the rear face with black Arabic chapter on the border for the date, small black subsidiary inner chapter rings for days of the week and another for months. A nickel movement, Geneva striping decoration, gold wheel train,18 jewels, counterpoised straight-line lever escapement, cut bimetallic balance, Breguet balance spring. Signed on the calendar dial, case stamped with maker’s mark.
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Diameter: 53.5 mm
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Signed: B. Haas Jne & Cie  Genève – Paris
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An interesting watch. The celebrated magician Jean Eugène Robert-Houdin is known to have sold this model by Haas under his own name. The watch has a mystery opening feature: only one cover can be opened at a time, due to a special gravitational device that allows only the top cover to be opened. When the watch is turned, the cover that had remained closed no matter how much the pushbutton was depressed, suddenly mysteriously opens.