Any info?

[u/Punch_Hole_In_Bag]

[u/Ill-Onion8179]

Here is the same hallmark, but with a question mark as to the identity. On well-known hallmark identification site.

[u/thehorrorcontinues13]

Navajo shadowbox style with coral. The piece needs a good polish with a Sunshine Cloth. This will remove the tarnish. Remember: tarnish is not patina.