Louke,
Welcome to the Thompson forum. It appears to me that you have a Thompson submachine gun that was manufactured by the Auto-Ordnance Bridgeport factory in late 1941 or early 1942. Production records by serial number are not available. I am guessing you are not in the USA and this Thompson is deactivated. Please correct me if I am wrong. If in the USA, I have some good suggestions on finding out the past history.
I can tell you the frame on your Thompson is from the Savage Arms factory. My guess is the frame on your Thompson has been renumbered to match the receiver serial number. The current authority on the World War II Thompson guns is by Frank Iannamico - American Thunder III. You will find a lot of information on your Auto-Ordnance Bridgeport Thompson in this publication.
It appears you have a very nice example of a World War II Thompson submachine gun. Thank you for sharing pictures.