I agree it's a Russian (or German) count's coronet.
The hatching with horizontal lines usually means blue, so the shield is blue. Without any hatching the eagle is supposed to be argent (silver, white). But I don't know whose arms that might be. The Orlovs, some of whom were counts, fittingly used a lot of eagles in their arms, but as far as I can see not just as the simple or only charge, like here.