Differences in Formula S Emblems

Found on ebay:1965 66 67 68 Plymouth Barracuda Cuda NOS MoPar Formula S EMBLEM | eBay

And this is the wording in the Ad:
NOS MoPar #2579443 Formula "S" medallion for 1965, 1966, 1967, and 1968 Plymouth Barracuda cars. These are used on the left and right fenders of the cars with the high revving HP V8 engines, 273, 340, and 383 and heavy duty suspension options. I know that some have a different Red White and Blue scheme, and some 1965 cars have different pin location, but these are what they are! New never installed.