I have seen fakes of the Hero star of Bulgaria. I also thought there were no fakes, and so I bought with confidence. (Yours looks legit by the way). The fake was in hindsight not totally convincing. The loop on the fake was too big, the surface front and back was too shiny, whereas you should see more of a matte effect, especially on the reverse. My fake also had no mint mark, and once I held it in my hands it showed signs of casting (subtle signs of metal shrinkage from cooling around the letters on the reverse). But I took it to a jeweller and he told me it WAS made from solid gold (10K or 14K). It also came in a real Bulgarian Hero Star case (an older version of the case you have, which is the 1980s generic "high-award" case without the order name on it). Since someone went to a lot of trouble to make my fake (and out of real gold) and in a real Hero box, maybe it's a once-off piece. I haven't seen any since, and the seller later sold what appeared to be a truly genuine one. Actually I'm still holding out hope that it IS real, just a late unknown variation. Wishful thinking perhaps?......