Guys,
My take on the difference in color or tone on the primers shown in my book is that the top has been sealed with lacquer or spar varnish. Both were used if I am not mistaken. See Dahlgrens treatise.
Thanks for sharing. I am not sure but I may have one more of the metallic Selma Quill primers but I will have to look. They are non-ferrous.
If you are interested in selling one of the small Selma friction primers please let me know.
Ya'll have fun at the show.