French coach watch very rare and oversized watch Circa 1800

Very rare oversized watch with cylinder escapement
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A very rare oversized pocket- and coach watch made by Prioux in Paris, France circa 1800. The flat open faced case of this watch is crafted from metal, has an original screwed dust cover and a floral engraving on the back lid. The white enamel dial has Roman hour numerals and Breguet steel hands and the movement has a cylinder escapement.
Dial signed.
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Diameter: 105 mm
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Weight: 420 g
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Signed: Prioux, à Paris