French Lépine with an off centre dial and very rare calibre Circa 1820

Very rare pocket watch with a comma escapement
–
A very rare small Lepine with an off centre dial, a comma escapement and a, presumably, original golden key, made circa 1820. It has an open faced 18 Carat red gold coin edged case, a very decoratively worked, guilloché dial with an off centre enamelled numeral circlet and blued steel hands and a movement with a very rare calibre and comma escapement.
–
Diameter: 33 mm
–
Weight: 23 g