These are brass, the real deal. In used and good solid condition. They came off a 1967 911 that I restored when I found an NOS set. It’s remarkable how heavy and solid the brass pieces are compared to what followed them. You will probably want to rechrome them. I can’t imagine that parts like this are still available as they were made only for a short time and there have been a huge number of SWB restorations over the past few years.