Thanks Susan!
You again have helped me. I hope I can sometime help you too.
По поводу шведских пушек, на сайте
http://www.mtek.chalmers.se/~m95perm/vapen/index.en.html
написано следующее:
"There is a 7,5 cm lvkan m/30-37, which roughly speaking is a m/30 gun mounted on a m/37 carriage. The m/30-37s had been ordered by Persia (Iran), but were confiscated by the Swedish government in late 1939."