the gun is stamped to chamber 3 inch shells and the choke tubes are the original.
under the forearm, he top barrel has CAM. 76 with a 18,5 about a inch away from it and on the bottom barrel it has KC1, 540 stamped with 18,4 about one inch to the right of that.
so from what im hearing the gun is indead a navy arms gun probably a modle 90 but the reciever was made in italy by a seprate company.
all of this has been very helpful and much appreciated