Prezes, I'm also wary of the possibility this is a fantasy piece. Although again, I do feel there's a good possibility that it's the real deal. It would take a close up examinaton of the hallmarks to verify that they are genuine, and then to confirm if the cross is indeed made of gold and that those are real diamonds.
Andrzejku, yes, I noted that the cross is smaller than the 1st Class Grand Cross, and therefore not correct for suspending from the sash. I guess someone felt that by virtue of the 'bling' factor, as Emil noted , the neck cravat was just not up to snuff.