How to read the serial number
12 - The first number indicates how many strings it has. In the example on the right, it's a 12 string.
6- Is the year it was made. In this case 1966.
1032 - The remaining numbers indicate which number guitar it was based on the number made. This is guitar number 1,032.


Third #
First #
6 string
or
12 string
last digit of the year it was manufactured (most likely a 5 or 6)
Second #
number made
Pictured example: