Hi Evgeny,
That’s an interesting sword. It looks like a combination of the sciavonesca swords pictured earlier in this thread, and the early hussar swords like the one of Stephen Bathory posted here (see below). I must confess that I never saw one like yours before, but I can’t rule out that it could be a transitionary example from the S shaped crossguard to a straight crossguard but before adopting the almond shaped pommel of later hussar swords. It looks like a hussar sword with a strong Venetian (because of the cat’s head pommel) connection. Venice and its surroundings supplied a lot of arms to Hungary, and parts of Dalmatia and the hinterland in Croatia was then part of Hungary in a dual monarchy. There were also many Slavic mercenaries from those territories that served in Venice.
It would be great to see the mark on the tang after cleaning.