When the Galactic Empire collapsed following the Battle of Endor in 4 ABY, the code disks remained in use within the Imperial splinter factions, along with the rest of the Imperial uniform.
In an interview published in the ninety-eighth issue of the Star Wars Insider, costume designer John Mollo revealed the "officers' disks" came from a shop in Borehamwood, England, where the Elstree Studios are located. They were in fact spare pulleys from the middle of a record player, and Mollo's costuming crew actually ordered about five hundred of them.
- Star Wars Handbook 1: X-Wing Rogue Squadron
- Star Wars: Behind the Magic
- Star Wars: The Visual Dictionary
- The Official Star Wars Fact File4
- Star Wars: The Complete Visual Dictionary
- "" — Star Wars Insider 98
- Star Wars Character Encyclopedia