Specimen #4163, Gum Bichromate, 7"X5"
Specimen #3718, Gum Bichromate, 7"X5"
Specimen #2454, Gum Bichromate, 7"X5"
Specimen #3382, Gum Bichromate, 7"X5"
Specimen #1451, Gum Bichromate, 7"X5"
Specimen #6478, Gum Bichromate, 7"X5"
Specimen #3490, Gum Bichromate, 7"X5"
Specimen #6543, Gum Bichromate, 7"X5"
Specimen #6734, Gum Bichromate, 7"X5"
Specimen #1284, Gum Bichromate, 7"X5"
Specimen #4500, Gum Bichromate, 7"X5"
Specimen #4679, Gum Bichromate, 7"X5"
