Yes by mass production. But their is a window to explore and discover if variety exist,I did go to coinshop to look for uncirculated to know the detail on the joint holding the visor and the helmet and hair inside the helmet some are more detailed than other cant find a variety listed in 1964 to 1967 listed considering their bulk of mintage. Just looking to other date that has no variety listed yet. That other die may overlap from one date or another or other die is used. Thanks custard.