1977 Limited Edition prints of 4 trains:"The General Steams Again","Coal Through The Narrows", Double Header!", and"Family Lines Diesels at Cumberland Tunnel"

I have four 1977 Limited Edition Prints of different trains with their titles on the print, but no signature. They are "Coal through the Narrows", "The General Steams Again", "Double Header!", and "Family Lines Diesels at Cumberland Tunnel" Each has a Plate number and Series Number. They are in the same order as above: Plate 111, Series 11; Plate 1, Series 11; Plate 111 (no series number); Plate 1 Series 11.Three are framed in matching old scuffed green frames, and one is not in any frame. I am not a photographer, but will try to make better pics if someone wants to offer me a tip or two. Thanks for looking.