French gold hunting cased musical cylinder watch Circa 1815

Gold pocket watch with rare musical movement 
–
A French, Parisian, 18 carat gold hunting cased cylinder pocket watch with rare musical movement, circa 1809-1819.
Barillet type escapement with musical cylinder.
White enamel dial with black Arabic numerals and gold hands. Plain case with small release button. Maker’s punch BC.
–
Diameter: 55 mm
–
Weight: 112 g
–
Signed: No name