Boris,
This gun is not a drilling, a drilling has 3 barrels. It is a BBF (Bockbuscheflinte?)(over/under rifle shotgun) instead. It is a post WW2 gun, but I think fairly recent. They are usually dated(month/year), but I couldn't find it in any photo you provided. The shotgun is in my favorite gauge, although others mistakenly prefer 12 ga. instead. The rifle is chambered for a very good, world famous, cartridge also. The scope and mounts combination is also very reliable. This is a very fine outfit, and in my unsolicited opinion you should not sell it, you should use it.
Mike
