Imperial officer's disk
Production information
Type	Security device[1]
Physical and technical specifications
Structure	Stepped cone shape[2]
Usage and history
Era(s)	Rise of the Empire era[3] Rebellion era[2] New Republic era[4]
Affiliation	Galactic Empire[2] Imperial Remnant[4]

[Source]

An Imperial officer's disk was an insigna and coding device used in the military branch of the Galactic Empire^[1] since its early days. They were already worn in 19 BBY by the graduates of the first Imperial class from the military academies.^[3] Such disks contained coded identification information^[1] and consisted of a metallic stepped cone shape appearing to be three disks stacked on top of one another. Code disks were featured on the hat and belt buckle^[2] of most high-ranking Imperial officers. Their function was similar to that of the code cylinders, which were also part of the officers' service uniform.^[1]

When the Galactic Empire collapsed following the Battle of Endor^[5] in 4 ABY,^[6] the code disks remained in use within the Imperial Remnant factions, along with the rest of the Imperial uniform.^[4]

Appearances

I find your lack of sources disturbing. This article needs to be provided with more sources and/or appearances to conform to a higher standard of article quality.

• Star Wars: Darth Vader and the Ghost Prison 1
• Star Wars: Darth Vader and the Ghost Prison 2
• Star Wars: Darth Vader and the Ghost Prison 3
• Star Wars: The Force Unleashed (video game)
• Star Wars: Empire
• Star Wars Episode IV: A New Hope (First appearance)
• The Second Kessel Run
• The Star Wars Holiday Special
•  Star Wars Galaxies: An Empire Divided
• Star Wars Episode V: The Empire Strikes Back
• Star Wars: Rebel Assault II: The Hidden Empire
• Star Wars Episode VI: Return of the Jedi
• Mara Jade: By the Emperor's Hand
• Heir to the Empire (comics)
• Crimson Empire III: Empire Lost

Sources

• Star Wars: Behind the Magic
• Star Wars: The Visual Dictionary

Notes and references