Yea, we exported a bunch but the War Assets Corp. destroyed WW2 surplus.
At the time of destruction, LB was still making No 4's mainly for export, as I understand it. Pakistan, India,
NZ
for sure ended up with thousands, but that mass exportation occurred after the CAF dumped the 4's altogether in 1954, with the issue of the C1 FN. I remember reading that 10,000 4's were sent to India, or was that Pakistan. Regardless, it fits well with your friend who saw them in the late 50's.
From what I could see, the only LBs left in
England
post-war were those left behind in part bins, or acquired by allied troops and likely written off.
One other thing you clipped was the NATO marking.
As I said before, the CAF has marked every rifle marked with CANADA since the FN, for sure. I see no reason why the CAF wouldn't stamp CANADA on rifles from the Korean war (UN) period. Especially if you consider that the No 4's were still the main battle rifle and that we sent less than 27,000 people, including a bunch who bunch would wouldn't be carrying a battle rifle; cooks, chaplains, officers, admin staff, machine gunners, anti-armour and the list goes on.....
While a lot of those Korean 4's could easily have been exported to the US, they'd already be marked from the UN mission. This would explain why the 4 I've found (only on
Canada
from BC to NS) are all marked in exactly the same place, with the same uniformity. That doesn't smell like an import stamp to me because it implies uniformity across US importers, before any was mandated. Alternatively, they were Korean wartime and never exported. In the end, who knows; I just can't conform to the impression that is an import stamp because while some personal opinion supports it, there's actual evidence that suggests more logical hypothesis.