French pink gold double-dialled pocket watch Circa 1890

Gold watch with gravitational locking device
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A large  French, 18K pink gold hunting cased, double-dialled pocket watch, circa 1890. With calendar, gravitational cover locking and special dial. An engine-turned case, the spring-loaded covers with a special gravitational locking device, and the front cover with an engraved and black enamel decorated monogram. White enamel dial on the front with radial letters replacing the numerals spelling the name Jose Heguilor, outer minute track and five-minute Arabic numerals, subsidiary seconds. Gold Louis XVI hands. White annular enamel on the rear with a black Arabic chapter on the border for the date and inner days of the week. A nickel movement, 18 jewels, wolf’s tooth winding, counterpoised straight-line lever escapement, cut bimetallic compensation balance with gold screws, alloy Breguet balance spring, and an index regulator. Bezel signed.
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Diameter: 55 mm
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Signed: B. Poitevin  Paris
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The case is slightly rubbed.
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This watch is of much higher quality than the majority of this model, it is made by Poitevin to the well-known design by B. Haas. Does the watch have 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.