It seems Kassa (Kosice) around 1800-1815. But it is a very unusual city mark from there, without the year! Can you make some better pictures about the maker's mark? Thank you! Best regards! Krisztián
Very unusual; I thought of Kassa (Kaschau) but in Tardy 1810 is number 13 under the crown and as early as 1812 there is a year within the mark. Regards
On the other hand the triangle mark with 13 is very unusual too. I'm very courious, and waiting for a good picture of the maker's mark. It can finally decide the question if it can be identified with the monogram of a known master. Best regards! Krisztián