Having owned many guitars and toyed with some nice vintage ones, with gold hardware, id say the Gibby in question has gold hardware. My custom Gretsch's gold hardware is aging nicely and in some lighting it looks silverish.
For replicas, you guys should look into the Chinese clones the guitar community refer to as a "Gibsun". There are other replicas out there but that is a good start. The headstock I believe is part of a copyright design so buy at your own risk as various countries customs agents may not allow them in. They are hit and miss in the US.
The best 335 clone ive ever played was made by "S101" and I still own it. It cost me $100 used, put about $100 into it and it out plays near anything next to a shredder.
I should also note that since manufacturing is based overseas many name brand guitars will show up on the black market with no names on them. Even in this day and age the assembly line will continue to run after hours and out the back door. Gretsch in particular was having this issue for some time, not sure if its still going on though but a $3000 guitar could be had for $200 without the name on it. Years ago while working at the Port of LA I picked up some Filterton pick ups and harnesses off busted up no name Gretsch guitars that didnt make it past customs. I didnt bother to dive to deep into the dumpster but there were also 335 clones and Fenders...