I have this antique sterling coaster with a wood on the bottom, and I can't find any hallmark but its tested sterling silver,anyone knows the maker of it or more information?
thank you
https://drive.google.com/file/d/1cpHkP6N_R5q0IPuTD5Ufz7GdfsmWsDNi/view?usp=drivesdk
https://drive.google.com/file/d/1cVy3WG5hB9iZcKVM77eWKvM_yxlGj-1p/view?usp=drivesdk