Dating fender reissue strats
The next number is the production year, in this case 9 = 1969.
The next one or two digits are for the month, here 10 = October.
On some Telecaster guitars the serial number is found on the bridge plate between the pickup and the saddles.1954-1959: Same as above, only the format is M-YY, leaving out the day. March 1962 to 1965: Dark blue or red ink stamps below the truss rod adjustment at the neck butt. The “XX” does not refer to the day; it is a code for the neck type (e.g. The “W” stands for neck width: “A” is the narrower, “B” is normal width, and “C” wider and “D”, though rarely seen, is the widest.First half of 1959: No markings for a period after a customer complained about an obscenity written on the neck butt. 1966: the model number (the number stamped on the neck before the month) change (for example, “13”=Stratocaster).Neck dating can be useful in finding the approximate age of your guitar.Since the neck is only a component of the guitar, it could have been produced a number of years before the actual instrument was assembled, hence the date on the neck is not necessarily the production date of the whole guitar.
A example of this is “02033923” found on a Jazz Bass.