I sent him a message asking if he saved all the information for these guitars, but I don’t know what will be lost in the language translation, of if he’ll even get back to me.
It’s widely known that the 8 digit serial numbers start with the year as the first number.
But the 6 & 7 digit numbers (located on the neck block) are just sequential numbers used by all the guitars they built, not just the FG’s.
I am compiling a list of 6 & 7 digit serial numbers with confirmed dates of manufacture from the internal date codes.
This will be very useful to find the year a guitar was made based on these sequential serial numbers, unlike the later 8 digit numbers that are based on the date of manufacture.
I’ve also found there are internal date codes that will reveal when the guitar was made. Date Code located on one of the interior sides of the guitar.
I’ve started a list of guitars I’ve found (including 3 of mine) with the model number, the serial number, and the date code, which will allow the 6 & 7 digit serial numbers to be grouped into a range for each year, allowing any 6 or 7 digit serial number to be cross referenced to the year it was made.
Truss Rod Cover on Green Label and very early Red Label FG's. WANTED – Could you please add to this thread with the following data from your vintage Green and Red label Nippon Gakki FG guitars that have serial numbers less than 8 digits, located on the neck block? Serial number on neck block (you can put an “X” in place of the last digit if you’d like).
I have 77 serial numbers so far, but only 31 of them have confirmed years based on the internal date code, and 22 of those had the internal date code listed. Internal date code (I use flashlight and a cheap USB endoscope with my cell phone, or my cell phone camera if the strings are off.) This is very important to establish the date range of the serial numbers.
I’m also tracking the Green Label FG’s, the earliest models (1966-67) only made in Japan, that share the same pool of serial numbers.
I’m looking for the transition between the Green and Red labels.
Sorry for the delay..with work and other guitar projects!