When I think iconic props, identity discs from Tron Legacy immediately comes to mind.
This is a prototype Kevin Flynn identity disc made by the production.
Most of the close up hero Kevin Flynn discs on screen in the third act of the film have metal eyelets or small magnet accents you can see as well as light up.
I did however find a screenshot at the very end of the film where Kevin Flynn switches discs with Quorra and you can see that the design is exceedingly close to this prototype (without the metal eyelets or magnets).
This piece also comes with this strong magnetic back connector piece which is pretty awesome.
