Free fuckfriend belgium - Dating fender bassman ten
So lets decode speaker with code of 2207147 That is a Jensen made the 4th week of 1971.
If it was 220603 That would be a Jensen made the 3rd week of EITHER 1956 or 1966.
Neither the date nor the value can be determined from the serial number.
Fender’s amps, unlike their guitars, are not tracked by the serial number.
I'd keep the original speakers and box them up in the boxes the replacement speakers come it and store them in a closet in an air conditioned space.