Gibson Serial Number Identification

Uses 4, 5, or 6-digit numbers impressed into the wood without a "Made in USA" stamp. This era is notorious for reused number ranges.

Factory Order Numbers, often accompanied by a letter (A-H), were also used. For example, a 4-digit number ending in 'H' indicates 1942. 2. The "A" Prefix Era (1947–1961) gibson serial number identification