If they are chess pieces, then they're not from the same set. There are eight pieces there, which would make sense for the back row, but, apart from the King & Queen, you would need to have duplicates, 2 x Bishop, 2 x Knight, 2 x Castle/Rook.
Nice pieces, though! Do they all have the very same signature on their base?
Any chance of a close up of one or two pieces?