To my eye, the matte dome looks like the chrome finish has simply rubbed off over the years through play. The sticker also looks odd, almost repro in colour, but perhaps that too is simply faded and worn through play wear and sunlight.
As for Klaatu, shiny boots versions are certainly available:http://www.imperialgunneryforum.com/t21 ... ead-part-1
Your photo does not show the back of the right boot, so I cannot see the COO, but to me it looks like it might be Lili Ledy. If I'm wrong, doubtless someone more expert than me will correct me