No such thing as a "Royal Cobra". Many versions nicknamed "King Cobra".
There was, back in the 70's, a guy in the SF Bay area by the name of Royal Krieger (only guy I ever
met named "Royal") who used to own the 289 "Flip-Top" racing Cobra (now owned by Rich Mason).
Perhaps this guy serviced some of Royal's cars (Royal did not strike me as the kind of guy
who could work on his own cars)?
regards,
Jeff