I don't think the design was licensed by Mauser. For the shotguns they bought a lot of parts in Belgium. And also for the model 146 and 640 Husqvarna bought 98 systems from FN. Probably for these smaller rifles the parts where also bought in Belgium, but there is little to none information.
There are some articles written by Frederik Franzen, which I will try to translate and put them on my website. I will take a long holiday this year, so there should be time to put in my website.

Fritz
Weiss Trading