Austrian silver verge with concealed erotic scene Circa 1800

Silver open faced pocket watch by Anton Reinberger
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An Austrian silver open faced key wound verge pocket watch with concealed painted on enamel erotic scene, circa 1800.
Silver case with an engraved band. Silver, engine-turned dial, eccentric enamel dial with Arabic numerals with gilt hands, two lozenge shaped gilt panels each engraved with a putto on either side and an engine-turned disc at the top opening to reveal a painted polychrome enamel erotic scene. Full plate movement, key wind, fire gilt, signed, with chain/fusee, solid movement pillars, three-arm brass balance and fine florally engraved and pierced balance bridge.
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Diameter: 54 mm
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Weight: 98 g
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Signed: Anton Reinberger in Wien