1977 Topps Star Wars C-3PO #207
"Golden Rod" Error, Corrected and O-Pee-Chee #141

3 Basic Versions (Error, Corrected, and O-Pee-Chee). Die hard collectors can also include the One or Two Asterisk variations on the bottom, to the left of the copyright.

2019 Article by Jake Rossen

I've always wondered about this other 1977 C-3PO card - #140. Similar scene and similar appearance.