Hi Koyli, Are you sure the serial number is 7 digits and not 6? If it should be 6 numbers then it's one of between 4000 to 6000 Inland receivers sent to Underwood in the late July and August 1943 time frame. Underwood needed extra receivers to keep production going so Inland sent them to Underwood. The rest of the carbine would have been made with Underwood parts. If it's 7 numbers then I have no listing of Inland sending receivers to Underwood in the April 1944 time frame and at that time Underwood had more receivers then they could produce carbines with.
Thx for the feedback.It's without doubt a 7 digit serial number. perhaps this doesn't make any sense but can the last digit be a suffix O instead of a zero? If not can we conclude someone messed with the serial number?
That is just what happened. At some point someone removed the original serial number and just stamped a group of numbers on the receiver. Happened to be in the Inland range of serial numbers. Your stock is one made by Marlin for Underwood so it's an original Underwood stock. The bolt has what appears to be a proofing stamp on it from one of the European countries. I would guess Germany, Austria or Belgium maybe. The rear sight being a type 1 would be correct for Underwood as would a front sight marked EU.
Although the rest of carbine is OK I think the issue with the s/n reduce the value.Further more as a collector you would like something else than a carbine with a non original serial number The carbine is on the market for €700 (approx. 940 USD)so I think it's wise to look for another M1 carbine. Thanks again for all your feedback