Solar panel mockup designed for a satellite application by Spectrolab, measuring approximately 12″ x 6.5″ x 6.5″, featuring two panels mounted at a 90° angle, bracketed to two blocks of wood. The panel bears a blue "Spectrolab" label with a part number, "U-734." The reverse of one panel has a tag annotated with voltage readings and a date of "7/30/74." In very good to fine condition.