Three more fuzes for identification

[US-Subs]

Two of these fuzes appear to be copies of the Soviet MG N, one with the markings in Latin, the other marked NSO-1. NSO-1 appears to have a factory code of 21, MG N has a code of 132. I'm trying to find out if MG N is the correct designation for each, and what country produced each of them.
The third is a slightly smaller fuze, stamped as M50. Any help is appreciated.

 

[LEAFLET]

Hello US-Subs,
The one you called NSO-1 must be NSC-1 I think and as you wrote they are all 3 Russian Fuzes.
The M-50 was used on the 50 mm HE already in WW2. I found the NSC-1 and MG N in a East German manual so maybe they produced them also.

Leaflet

 

[MINENAZ16]

MG-N and NSC-1 = East German

 

[microplastic]

afaik the M50 was also used for Mortar shells. Got one from 1940

 

[US-Subs]

Thanks guys