About 5 years ago I bought a pair of Cuda inserts from a friend that said he bought them 15 years prior to that. Now he told me they were nos, but came in a box with white wrapping paper, so I was sure they were reproduction. Upon closer inspection, Beijing each one looks like part numbers. The numbers look cast into the trip, not stamped. I’ll try to post better pics in daylight, but kind of confused now. I was going to sell theses, but I don’t want to misrepresent them. Any info guys?