I found these bayonets on the atticks of grandfather of my wife. Can you please help me with identification?

Location is Slovakia. Based on the googling one on the top is probably bayonet with scabbard of Czechoslovakian army from WWII era. But they look very similar from that era, might be vz24 from 1929. But I have read they have mark ČSZ Y on them, and mine has ČSZ U.

Second one is tough one, I havent found it when comparing with images google found. Some shapes looked similar, but they have never been the same. I thought that hole in the end might help with recognition, but that is probably just missing screw or something, because I have found no other bayonet with hole in the end of handle. It is pretty long so I thought WWI at first, but it doesn't look like most bayonets of Austria-Hungary, which was my first guess based on location of find. Oh and handle doesn't seem to be from wood.

Any help is apreciated.

One more question, should I restore them? Or should I display them in current state? I was planing to remove rust first and than polish them, but I am curious what you think about it.

Thanks