Hi All, I am new to this forum please excuse my ignorance. My father was in a band and has a Gibson SG standard with the serial number 147508. He can't remember what year he bought it. I've been on the Gibson website but cant find any information pre 1975. My father thinks it was bought in 1967,1968 or 1969.Does anyone know a way of finding more information on the guitar from the serial number.