antique, very large clock marked 1818

Hi,

I just bought an antique clock marked 1818. Handpainted case, paper dial handpainted as well with number mistakes: "5" instead of "3" and some numbers are upside down! Paper label on top, but too faded to read. The previous owner said the clock worked well, but I only have a key for the door, not one to wind. Reverse painted scene on the glass door of a farm and landscape.

Dimensions are: 17 3/4" wide by 5" deep by 34 1/2" tall.

Help! I have no idea of the actual age of the clock, what it's worth and if it would be worth to have fixed to run (and those costs).

Thanks so much for your help,

Nessa