In April 2017 Ebay chevua2014 from Ukraine was trying to sell this fake Ukrainian plate. He says it is new (unused) and military. He shows it is 300mm x 187mm.
The problem is that military plates never has 3 letters, the size is wrong and the „dies“ used are wrong. This is some sort of home-made plate; a fake.
He is a dealer in anything and everything so I am sure he has no idea what it really is and just guessed at the description.
Ask yourself why a plate from before 1980 would be unused and check very carefully with photos on the web of genuine plates that it looks correct. This one does not.