I have a dated Vz. 23 military issue that I can pull out to check later. But for now, here is an undated Vz. 23 commercial phosphate CZ example that my best recollection says is the same. And I no longer have any postwar CZ bayonets, but my best recollection with them is that the phosphate color is not as dark. So time or perhaps something else like the grease used etc may be a factor as well (?).
But the answer to the question from what I can see at a distance as regards the no muzzle ring bayonet that is pictured, is it looks like to me also that just the exposed parts are blued(?). And ‘in hand’ I would be looking for evidence of cold chemical bluing that is sometimes used to cover up flaws, new work, etc.
