That pretty much depends on who you define as "proletariat". These guns were mostly given - when they were "presented" - to officers of about the rank of colonel. Given 4 years of war, most of these colonels started war as leutenants or even privates, and originally came from peasant or working class families.
Do you mean to Officers of the GDR army? The GDR wasn't established until 1948-1949. Suhl was in the Soviet zone. I would have thought guns like these would have been made strictly for the Soviets at this time? If so, that's understandable, in light of the massive potential promotions during the war for the Red Army. That's what massive expansion and 14,000,000 dead and missing will do to an army. (officially listed as 8,700,000, but disputed) Not to mention Stalin's purge of Red Army officers in 1941...
Ken