Oct 7, 2018
Oct 20, 2018
The following is copied from a reply from Bose tech support which I received earlier to that same question:
"You can find the manufacture date of your system by the four digits after the letter "C" in the serial number. The first digit is the year (3 being 2003), and the next three digits are the day of the year (215 being the 215th day of the year, or August 3rd)."
Oct 18, 2017
Dec 15, 2016
Thanks for the great question. Without the original serial number, it would be hard to get an exact date. It is for the original Wave Radio/CD player that we haven't made since 2004.
Tony G - Community Support