This is followed by the sequential number for that particular model.The serial number will be located on the neck plate on the back of the bass.The following two digits denote the month, and the remaining four digits denote the instrument’s sequential number of manufacture among all the instruments made during the month indicated.Gibson has used various methods of numbering from 1900, so it is not simply based on the serial number to identify the year of manufacture..See the explanation for serial number 20070311301 below: 20070311301 First four digits indicate the year - 2007 20070311301 5th & 6th digits indicate the two-digit month - 03 (March) 20070311301 7th & 8th digits indicate the day - 11 (the 11th) 20070311301 9th digit is a series code number - 0 for 300 or 400 Series, 1 for 500 thru Presentation Series, 2 for 200 Series, 3 for a Baby, 4 for a Big Baby, 5 for T5, 7 for Nylon Series, 8 for 100 Series, and 9 for Solid Body Series. 20070311301 Last two digits indicate the guitar's position in that day's production sequence. Record keeping in the early days was spotty and it's uncertain which guitar is actually the first one, but these two were built within the first few months of Taylor Guitars production.For models older than 1993, please refer to the chart below.The first two digits designate the year of manufacture, followed by two digits denoting the month.The remaining four digits denote the instrument’s sequential number of manufacture among all the instruments made during the month indicated.

In these eight-digit numbers, the first two digits signify the number of years since Takamine’s establishment in 1962.The following number determines the model: 5 or EG for the EG models, then the sequential number for that particular model.The year of manufacture is determined the same way for the Swamp Ash Special.FON consists a batch number of usually four digits, followed by a one letter (sometimes prefixed by a space) followed by one or two digits (ranking).1935-1937: Letter between the batch number and the order number. 0123 A5 1938-1941: Two or three letters before batch number. If there is a second character follows it is the code for the type of the instrument.