Check the back of the headstock, write down the serial number & go here, that's the only way you'll know.
Should be one of these three
1975 - Present, This old style serial number will either be on the neck plate or impressed into the back of the headstock. It consists of a letter, A - L, followed by a 6 digit number. The letter stands for the month, A for January etc., the first 2 digits will be the year, 76 is 1976, 96 is 1996, the last 4 digits will be the consecutive production number for that months production, 1356 would be the 1356th guitar produced that month. This form of serial numbering is still used today on guitars where the number is impressed into the back of the headstock. A761356 - The 1356th guitar produced in January '76
1987 - Present - These serial numbers will either be on the neck plate or on a serial sticker affixed to the back of the headstock, with some models still following the impressed old school serial numbers shown above. There are many variables of numbering through these years and between different models and are broken down into 3 categories, stickers, plates, and the impressed numbers that follow the old school style detailed above.
HEADSTOCK SERIAL STICKERS
1987 - 1996 - Guitars built in Japan between these years will have a serial number beginning with F followed by 6 numbers. F is the production factory which stands for Fujigen. The first digit will be the last digit of the year, ie. F8***** is a guitars made in Fujigen in 1988. The last 5 numbers will be the consecutive number denoting production count for the year. 25899 would be the 25899th guitar built that year.