A perfectly imperfectly patinated Felix Potin Paris confiture pot with an ombré caramel patina and some crazing, it has maintained the lovely shine of the original glaze.
 
It has the authentic Luneville stamp in the base, it is quite faint, I have indicated it with an arrow. This stamp dates it to right at the start of the 20th century.
 
There is a little chippiness on the base. It stands 5.5" tall