The Boss stompbox serial number decoder

With model cross referencing and user manuals

You can use this tool to find the manufacture date of any Boss product (as well as the very early roland branded pedals). This includes guitar effects pedals, multi-effects processors, drum machines, tuners and metronomes. It works by first decoding the date code part of the serial number, then because the date code on Boss devices was repeated it will be compared to my database of Boss product manufacturing dates to narrow it down to only those dates when the unit was being made. For pedals manufactured for a long time you may be returned multiple possible dates. Boss have used three formats for their serial numbers over the years. Pre 1989, 1989-2010, and 2010 to date. This tool supports all three formats and if available a link to a PDF manual will also be returned.

For details of my database click here. For Roland products please use the separate Roland decoder as that has the database for the Roland production dates.
You can normally find the serial inside the battery compartment or on a sticker on the base.

Boss Serial :
Boss Model : (leave blank if its not in the list)