I've heard the scarcest M38 carbine Swedes by Husqvarna are the 1944 vintage.
How many of them were made versus the earlier years'42 and '43?
According to a good friend that's a Swedish Mauser fanatic, here's what he wrote me when I forwarded him your question:
According to the book Crown Jewels the production numbers are:
1941 - 28,672
1942 - 38,781
1943 - 14,156
1944 - 1,969
When he mentions the book Crown Jewels, this is what he's referring to:
Crown Jewels - The Mauser in Sweden: A Century of Accuracy & Precision