Hi Anne,
In the meantime I have found out that it's Russian glass.
Silverplated metal. But I think mine somehow has most of it's silver off.
Don't know what could be the reason for that. Only the metal on the lower
side of the ashtray still "shines" abit.
I have found a couple of examples. With the Russian double eagle.
Your glass seems to be exactly the same, although the silver might have a different style to it.
The odd thing that I notice is...
The rim of the glass on most examples I found, and also on yours, has a little
(I dont know how to say this in English) a little bit sticking out.
If you google something like this you should also find it:
"Russian Double Eagle Glass"
"Silverplated Double Eagle Glass"