In this quarantine period I've been going thru several boxes of Mustang parts I acquired from a closed Mustang Shop. Most of the items I know about but this one is questionable. The 66 Instrument Cluster Lens (also 65 GT and 65 Deluxe interiors) does not seem to have any markings, no part number, no Ford logo, nothing. It may very well be a reproduction. In the 60-68 Ford Car Parts (aka MPC), it is identified with C5GY-10887-A, a Mercury Comet service part number. The question is this a reproduction item or is it a legitimate service item?
Jim
