Boxed shade guide for "Biocron" acrylic teeth, by De Trey, Switzerland, 1965-1980 Boxed shade guide for "Biocron" acrylic teeth 1965-1980
Shade guide for "SR Vivodent PE" acrylic teeth in plastic envelope with instructions, by Ivoclar, Liechtenstein, 1970-1980 Shade guide for "SR Vivodent PE" acrylic teeth in plastic envelope with instructions 1970-1980