"...had Springfield Armory stamped on..." As in "Springfield Armory"?
Springfield Armory the U.S. government's arsenal did not sell or import anything for civilians. SA Inc. is Springfield Armory in name only and didn't exist until 1974. No Lee-Enfields made by them. No bolt actions at all mentioned on their company history page.
Savage made No. 4's were made under contract to the Brits before(Not by much though.) there was such a thing as FDR's Lend/Lease Act. When the contract ended(1944), all remaining rifles, parts, machinery and tooling was packed up and sent to Canadian Arsenals-Longbranch Plant in what is now Mississauga, Ont.(big bedroom community west of Toronto. Across a creek west. Grew up about 5 miles from the where the plant was. Been in the old building that's just a concrete pad now.) and subsequently issued to CF units. Had one on my MIU, long ago.
I'd guess it was stamped by somebody who bought one of the stamps. Mind you, it may have gone through SA on its way to either Long Branch or England. Not likely though.
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