From same museum, in case people are interested in a 4115 brochure https://vintagetek.org/wp-content/uploads/2022/03/4115B-brochure.pdf https://vintagetek.org/w

From same museum, in case people are interested in a 4115 brochure https://vintagetek.org/wp-content/uploads/2022/03/4115B-brochure.pdf https://vintagetek.org/wp-content/uploads/2022/03/4115B-broc...