Back when I worked at a camera store, we sometimes had orders for copy prints from old photos. We did not have a lab on-site (it was a small store), so we'd send this type of work out. One time a customer brought us a few 5x7 Kodachrome transparencies (family portraits) from the 1940s. They were stunning! I did not want to send them out and have them get lost in the mail or damaged by the lab. I told the customer that they were in possession of a historic artifact, and would be better off taking them to one of the pro photographers in town.