There is a way to tell if these are fake. Let's face it, we have all seen the tags sell for up to $1250.00 on E-Bay. Other than a 421 H.O. the next expensive one is the 428 H.O. and the 389 Tri Power Motor Tags. They sell for $650.00 to $1125.00 and usually can make the difference in a lost car show and first place!