Movie Accurate Imperial Officer push button ANH Style Operations Chief rank badge. Same badge is used by Juno Eclipse, in the Extended Universe.
Precise attention to detail has been used in making sure the materials used replicate the movie used props.
Push buttons are the smaller Original Trilogy size, and are genuine EAO industrial push-buttons. They're affixed to an aluminum bar 1" in height. Mounted on two magnet strips to easily clip to uniform.
The perfect addition to your 501st costume!