1970 1989 most amps do not have a date code stamped on the tube location chart.
Fender bassman cabinet serial numbers.
A7 five digits not four.
It does give info on dating fender amps by serial number.
If four digits are present the first two digits refer to the year i e a 66 would mean 1966.
From 1952 through the spring of 1954 fender produced approximately 660 model 5b6 bassman amplifiers serial numbers 0001 0660.
These numbers always begin with eia 606 and are followed by three or four digits in various combinations.
If you are unable to find the production stamp find the serial number that is also printed on the tube chart.
Here are the serial number schemes from 1951 to 1970.
These codes are for amps with the serial number beginning with a letter.
Citation needed the earlier cabinets have been called tv front designs 1 with a front panel that had a rectangular grill cloth with rounded corners and looked much like a television of that era.
I got this one.
For example the serial numbers for 5f6 and 5f6 a bassman amps run from bm00001 to bm04600 therefore we can conclude that there were about 4 600 units made.
It doesn t hold any info about dating fender cabinets.
If three digits are present the first digit refers to the year i e a 7 would mean 1967.
The site gives info about amps with i e.
How about those rarebird vibroverbs.