When the rifle was in 1945 beside the stock repair in good condition, the Norwegians could chose it.
Personally, I would take the 147 1940. Like you said, the offered 147 1939 has more mixed parts and the floorplate manufactured by Astrawerke is in addition force matched.
Aah....... you've clearly worked out who has them then by that last statement
And yes, on the proviso that the bore is good enough, I had already said yes to the '40 one based on first look, even with my sparse knowledge of K98's.