I came across a side by side made by Husqvaran in 1915, according to the serial number and the info from online sources. 12 gauge 2.5'' chamber, inspector mark "O" for Oskar Fredriksson and model stamp 310AS. The odd part about this all are the two Nazi stamps on the bottom of the barrels on the flats. One on each side of the lug. I can't find any source this. Sweden was not occupied by Germany, there are no German proofs. Any idea?