I was cleaning out some parts bins and came across these that I bought a few years ago when I bought a whole bunch of 58 pontiac parts.The father had passed away and his son was selling the parts so he didnt know too much about the process but thought they were cast in brass in sand and then chromed.Was wondering if anyone here has any experience in casting parts.These emblems are from a 58 parisienne,they turned out quite well,the letters are slightly larger and need some finishing on the inside to make them perfect,also the mounting tabs are thicker but other than that not a bad casting.Ill get some pictures of the fender bar castings soon.The emblem on the top in the pictures with the missing e is an original emblem.