Can't find anything on this particular serial number but it is a FT-120 model with the serial number 12781091. = Harmony Standard Series guitar built in 2019. Note #2: Guitars with no serial number were produced at many different times. Initially focusing on electric and acoustic electric archtop jazz guitars in the 1950s, they expanded into folk and glues guitars in the 1960s. Do you have a serial number? That would help in trying to figure out the year. Fender guitars produced in Japan have the serial number on the back of the neck, near the attachment to the body. It is a Chinese Harmony, and you recently acquired it, so frankly, it is 'worth' whatever you paid for it. The first serial number used was a Strat-style guitar with the Heineken beer bottle label painted on it, November 9th, 1981. 60 electric guitar - it's in very good condition - hardly been used - serial number's 08290 - I was wondering whether anyone could tell me how much it's worth? Find a Guitar Blue Book Online. NOTE - Gibson USA goes to a 9 digit serial number in early July 2005. The number one source of guitar and amplifier pricing and information so you can find the price and value of your used guitars and amplifier. What is my guitar worth by serial number If a serial number is not in the lists or is not recognized in the serial number decoder, it does not mean that the guitar is a fake.