Differences in Formula S Emblems

davescuda said
The one on the left is 1965.. On the right Yes 66 to 68 the same

Dave by your info the 2579443 is a 66 and I believe is the one i purchased. The 2579442 is really what i need. When i get it I'll see how it sets on the fender. It may be a resale part. Thanks for your help.