Thanks Dan. I’ve pulled the 6e5 eye tube. It was clearly an add-on. The chassis has been restored, and I’ve been working on the cabinet. Behind the door on the 10-120, there used to be a “map pocket”. Ron in Saskatchewan gave me a picture he drew of it. Most had fallen apart due to poor materials, but he saw one and drew out what he saw. I’ve made a reproduction of the map pocket based on this information and will have it in place when I’m done restoring the cabinet.