Here is an example of another Hirshfanger bayonet – Danish. It has almost exactly the same locking mechanism as my bayonet. The steel piece on this mechanism should be on mine but it is missing. You'll see the similarities with my bayonet in its style - both look like classic hunting swords, though this one with its odd shaped crown or crest still looks a bit like a hirshfanger. Mine has lost that shape, however the similarities are still clear. At least they're clear to me.
http://www.holmback.se/bayonets/Notes/Dan.htm