The Waffenamts on smaller parts, as pointed out earlier, aren't a definite indicator of where the receiver itself was produced. The rifle will be marking on the left side of the receiver ring with the name of the factory that did the work, though a few are simply marked 'OHPJ' (which is Cyrillic FNRJ - Federal National Republic of Yugoslavia).ДЄs for telling original date of German manufacture, that will be pretty tricky. There were 5 different factories that refurbished the Yugo capture K98s: Preduzece 44 (which is the most common), Radionica 124, Radionica 145, VR69, and TRZ5. So if it doesn't have the '/48' markings, that isn't necessarily proof that it was refurbished prior to 1950. Unfortunately, there were several factories that worked on these K98s, and not all of them added the '/48' starting in 1950. So if yours has the added '/48' designator, it was refurbished in either 1950 or 1951. This was accomplished be either adding '/48' to the end, so that it reads 'Mod 98/48', or by scrubbing the side rail and remarking it 'M98/48'. But starting in 1950, some of the rifles began being marked as '98/48'. Initially, they left the 'Mod 98' marked on the left receiver rail alone. These K98s were known in Yugoslavian military inventory as 'Model 98/48'. German K98s were only refurbed in Yugoslavia from 1946-1951, and the markings changed a little during that time. There no way to know an exact date of refurbishment, but you can try to narrow it down a little.

Yugo mauser k98