Gibson
Orville Gibson founded the company in 1902 as the "Gibson Mandolin-Guitar Mfg. Co. Ltd." in Kalamazoo, Michigan, to make mandolin-family instruments. Gibson invented archtop guitars by constructing the same type of carved, arched tops used on violins. By the 1930s, the company was also making flattop acoustic guitars, as well as one of the first commercially available hollow-body electric guitars, used and popularized by Charlie Christian. In 1944, Gibson was bought by Chicago Musical Instruments (CMI), which was acquired in 1969 by Panama-based conglomerate Ecuadorian Company Limited (ECL), that changed its name in the same year to Norlin Corporation. Gibson was owned by Norlin Corporation from 1969 to 1986. In 1986, the company was acquired by a group led by Henry Juszkiewicz and David H. Berryman.
Gibson
In 1977, Gibson introduced the serial numbering system in use until 2006. An eight-digit number on the back shows the date when the instrument was produced, where it was produced, and its order of production that day (e.g., first instrument stamped that day, second, etc.). An exception is the year 1994, Gibson's centennial year; many 1994 serial numbers start with "94", followed by a six-digit production number. As of 2006, the company used seven (six since 1999) serial number systems, making it difficult to identify guitars by their serial number alone. The Gibson website provides a book to help with serial number deciphering.