mojcoin
The one below.


30th Anniversary of second AVNOJ meeting in Jajce (16mm; .900)
1973
Medals › Commemorative medals: 30th Anniversary of second AVNOJ meeting in Jajce
Gold (.900) • 3.5 g • ⌀ 16 mm
N# 313433
Looks like a variation, as this one has a ‘900’ mark (indicating the purity of the gold), whereas yours doesn't seem to have anything in that space. Have you checked the weight? If it is different, please do spend some time adding it to the catalogue by copying the gold coin's page and adjusting it accordingly.
Also, have a look at the other two gold coins in the series (different sizes), especially the location of the gold symbol. You're coin may be a variation that is more similar to those if it's the same size as the one you've matched it against in the catalogue (possibly a later issue?).