Gibson dating system
The company was formerly known as Gibson Guitar Corp. 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 (E. L.) that changed its name in the same year to Norlin Corporation.
RRRR = ranking number Example - R03D0263 was made in April 2003 at the Peerless Korea factory, unit 0263.
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But instead the culprit was a poisonous spider bite, the bug finding a way into his shoe during a day working on the backyard koi pond.
As the flesh on his left big toe started dissolving, revealing tendons and, soon, bone, Gibson figured this wasn't gout.
Note: Custom shop guitars are not supported The Gibson Serial Number Decoder currently supports 6 formats from 4 Factories.
Tokai copies of the Gibson guitars (Japanese manufacture) typically have seven-digit serial numbers ("SN") impressed into the back of the headstock.