Burnsie - D.Sheppard is correct about the ID of the heads. Actually the black head on the left was made by the Bod-Kin manufacturer for Herter's. This is not a well known fact as I have not previously documented it in detail. In "Broadheads 1871-1971 Identification and Rarity Guide, Third Edition", there will be several different models of the black heads like yours that will be categorized and shown with the other Herter's broadheads. Not really a rare head, but previously not recorded accurately.