It would be more accurate to say that approx 650 of each of these models were produced in ’60.
After the year prefix, these models use a code of "EB", indicating Electric Bass.
Fender began producing instruments in its Ensenada, Mexico, factory in 1990.
Instruments made between 19 carry “MN” prefix serial numbers, with the “M” designating Mexico and the “N” designating the 1990s.
The serial number of an speaker cabinet is located on the back of the cabinet in the upper right corner.
All cabinet serial numbers begin with the code "SPK" and are followed by the two digit year prefix.