What you will have to determine, is ..the frame....i.e. what is it made of,by that i mean...is it real wood, or a man made material that has be gilded,....or plaster,..a pic of the obverse side would be helpful,..how is the mirror held in to the frame,..the general location from where it came,..as for a mark....not everything has marks...and just because they don,t have a makers mark,does,nt mean they are cheap...it just means they are harder to put a value on...