Chrome air cleaner lid removed from a Q code, 351-4V or 351CJ 1972 Mercury Cougar or Ford Mustang, likely Torino and Mercury mid sized cars too. Ford / Mercury have had various part numbers listed for this basic lid over the years. The primary difference was the original lids included an engine size sticker. That is why there are so many listings, the basic part number is 9661.
Chrome will be used, and will have some defects to the plating.