If the guitar was made in Korea, it will either have an "I," which stands for Saein; a "U," which stands for Unsung; an "S," which stands for Samick; or a "P," which stands for Peerless.If the guitar was made in China, it will be denoted with a "DW," which stands for Dae Won; an "EA" or "EE," which stand for Gibson's Qingdao factory; an "MC," which stands for Muse; a "SJ" for Sae Jung; a "Z," which represents Zaozhuang Saehan; or a "BW," which just stands for China itself.Originally an independent brand, Epiphone was bought by Gibson Guitar in 1957.As opposed to a brand such as Fender, whose guitars are either made in America or Mexico, Epiphone's guitars can come from a number of different factories in a variety of countries. The numbers appear as the 5th and sixth digits in the serial number.]11 = MIC sticker on a '08 Masterbuilt12 = Dea Won or Unsung (China -- uncertainty remains as to which factory)15 = Qingdao (China) -- electric16 = Qingdao (China) -- acoustic17 = China - factory unknown MIC sticker on a J160E18 = China - factory unknown found on one 2009 model bass20 = Dae Won or Unsung (China -- uncertainty remains as to which factory)21 = Unsung, Korea22 = ??? Indonesia (factory still unknown, probably Samick,)I = Indonesia (this letter has appeared as the 5th digit on two authentic new models made in Indonesia ANOTHER CODES: FYYMRRRR F = factory code (See "Factory number code" above) YY = year of manufacture M = This will be a letter code corresponding to the month (A=January, B=February, etc...). You can figure it out by yourself (when and where your guitars were made). Anyway, I'll be glad to help those who can't "read" their serial numbers properly, but it might take time to reply. (Cari, Epiphone Les Paul Custom Facebook Group administrator. YYMMFF12345 YY year MM month FF factory-code12345 production# FACTORY NUMBER CODES -- for some models starting in 2008, if serial # begins w/numbers[NOTE: The factories identified by these codes are based on patterns which forum members have observed.In 1951, a four-month-long strike forced a relocation of Epiphone from New York City to Philadelphia.
If these two numbers are "05," they denote that the guitar was made in the month of May. These numbers represent the ranking of that guitar in the production process.
Locate the serial number on the back of the guitar's headstock (the top of the neck where the strings are attached).
The serial number will generally be nine to 10 digits long, with the first being a letter. This letter represents in which country the guitar comes from, as well as the company who manufactured it.
Aside from guitars, Epiphone also made double basses, banjos, and other string instruments.
However, the company's weakness in the aftermath of World War II allowed Gibson's parent, CMI, to absorb it.