I don't know enough about Yugoslav production to give a definitive answer. Boatloads of Model 48 rifles in very good condition were imported not very long ago. Mine are stamped "M 48" or "M 48 A" below the crest on the ring. These actions are Mauser 98 pattern but slightly shorter.
The Yugoslavs refurbished some German 98k captures which may be what you have. See Wiki article
Here. If you go to
Boyd's they give dimensions for their stocks which you can compare to your rifle, particularly center-to-center action screw distance and overall floor plate length.
