Mystery Yenko valve covers on ebay...

[JoeC]

I am trying to figure out what they did. It looks like someone either made the Yenko crest stamping tool or got access to the original. Then they bought cheap valve covers and stamped them. I would think the stamping operation would damage the chrome plate so I am guessing that they have to stamp before chroming. It looks like they went to a lot of trouble to make the fakes.
I emailed them asking if they had original boxes or receipts but not expecting a reply.