Solothurn S2-200. Adopted by Hungary and Austria using the 8×56mmR . Germany eventually acquired around 10k of them and rechambered them for 8mm Mauser. Sadly I read that no 8mm version survived. The 8mm version has a magazine similar to the MG13. Hungary has a curved mag.
Posted by IcelandicHossi01@reddit | ForgottenWeapons | View on Reddit | 2 comments
Villafuego@reddit
A number of them in 7mm were sold to Colombia in the 1930's as well.
Peter Kokalis wrote an article about them in SGN about 10-15 years ago
Last_Entertainment86@reddit
The article was in the Shotgun News and was reprinted in 2013 for his book on Machine Guns.