Every Original Prusa printer has a unique serial number assigned to it. This is found on a silver sticker on every machine and is also hardcoded to the main controller board. Serial numbers issued before November 2021 start with "CZPX", while after November 2021 we introduced a new format starting with "SN". All serials are registered in our internal database and they allow us to confirm your printer as genuine.
|Original Prusa MK-series until 2022
|Original Prusa MK-series from 2023
The Original Prusa XL may have one or two silver stickers. If the printer has one sticker, the serial number will be on the bottom left. If the printer has both the silver sticker on the bottom and on the top left, the one you should use is the one on the top. In either case, the label will show the text 'Original PRUSA XL'.
|Top printer serial number
|Bottom printer serial number
The label can be found on the side of the PSU holder.