18K solid gold ring intaglio agate coat of arms coat of arms knight eighteenth century

Ring in 18 carat solid gold finely chopped, set with an intaglio agate with knight's coat of arms with a coat of arms armor with a lion, early eighteenth century.
This ring is in good condition. No trace of punch but it was tested in 18K gold.
A note: it has probably already been handed size (ring modified), some bores, scratches and deformations on the ring, slight wear time on the intaglio, see photos.