The savage I have is marked 1942 with a 2 groove barrel, check the site below it shows a S that looks like a 5 infront of the model # is this what yours looks like? Also check around the steel by the butt stock for a year stamp.
US PROPERTY mark ID’s this rifle as part of “Lend Lease”, “flaming bomb” US Ordnance stamp, large “S” for Savage, and model designation.
So it was that Savage Arms Corporation in Massachusetts got a contract to produce Lee-Enfield No. 4 Mk I* rifles. Savage produced over 1 million No 4 Mk I* rifles between 07/22/41 and 06/22/44. The exact number is in dispute, however, all sources do agree the total was far in excess of 1 million.