Stephen R, thanks for the explanation of Bulgarian chant. A young Ukrainian priest tried to explain some of this to me, but his English was poor and my background nil.

Uncle Jacque, don't attempt restoration without professional help. Regardless of the age, it is a lovely triptych.
A suggestion- To keep people from handling it, and to avoid dust, I have a native American figure in a shadowbox type mount on the wall. A clay maquette of a wall sculpture will be mounted in the same way.