There are some accounted for in Italian military documents, and I wouldn't be surprised if the Bulgarians grabbed some. Yugoslav arms wound up mostly with the Germans, and were widely dispersed in the occupied areas of Europe. The M1924b's would require a compatible bolt for this reason.

Domestically produced Yugoslav Mausers used an intermediate action, as opposed to the standard length action of the German Mausers. The stamps on the underside are correct for a G.98 bolt, which is what the M1924b's used anyway. This could be the original Gewehr 98 bolt numbering, but I don't know. The Yugoslavs never numbered their M1924 bolt components, except on the bolt arm and with a proof stamp on the bolt ball. The Kennblatter identifies these as the 'Gewehr 291/2(j).' According to Branko Bogdanovic, these were seized by German forces in 1941 and removed en masse from Yugoslavia to Germany. Unlike the majority of these, this one has a matching bolt. It's Gewehr 98 heritage is readily apparent, and it still bears the expected cartouches and features on both metal parts and the stock. This one is not depot marked, but the numbering on the bolt doesn't strike me as WWI vintage (although that's not my area of specialty), nor was it Yugoslav practice to number anything on the bolts except for the bolt body.

Most are found very well worn and with beat-up stocks, so a 1924b in nice condition is indeed a good find. The received wisdom is that both Gewehr 98 and Mexican 1912 Mausers were used to construct these, but it appears that far more turn up with Gewehr 98 features than Mexican. The Yugoslavs built this variant using ex-German Gewehr 98 receivers and parts, and Yugoslav barrels and sights. It doesn't seem like there are that many of these floating around, and they're probably overlooked or assumed to be well-worn Model 1924 rifles with odd features.

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