French 20K gold quarter repeating à toc pocket watch Circa 1770

Gold, enamel and diamond verge watch 
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A French 20K gold painted-on enamel and rose-cut diamond-set pocket watch, circa 1770. A quarter repeating à toc watch with an outer protecting case. A Louis XV case, the bezel decorated with blue and red enamel over a chased wave pattern and set with rose-cut diamonds, pendant and thumb-piece set with large rose-cut diamonds, the back with a monochrome pink painted on enamel allegory of astronomy, chased and engraved laurel border.
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White enamel dial with radial Roman numerals, outer minute track and Arabic five-minute numerals and rose-cut diamond-set hands. A matte gilt, full-plate movement, fuse and chain, verge escapement, three-arm steel balance, fl at balance spring, pierced and foliate engraved continental balance cock with polished steel endplate, silver regulation dial, repeating on the inside of the case activated by depressing the pendant. Dial and movement signed the case with French hallmarks.
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Diameter: 41 mm
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Signed: Firino  Paris
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Slightly restored soft enamel on the case.