They were made by Terada and usually have an Orange Epiphone label.Epiphone is an American musical instrument manufacturer founded by Anastasios Stathopoulos, currently based in Nashville, Tennessee.The second, third, and fourth numbers show on which day of that year the instrument was made.

1998-Current The Yamano Gakki Epiphone Japan serial numbers from 1998 onwards are in a YMMPPP format.

Y = Year of manufacture MM = Month of manufacture PPP = Production number The serial number letters used by the Terada and Fuji-Gen guitar factories are: Example: J902123 = Terada / 1999 / February / unit 123Example: T902123 = Terada / 1999 / February / unit 123Example: F902123 = Fuji-Gen / 1999 / February / unit 123Example: 902123 = Fuji-Gen / 1999 / February / unit 123 1987-1997 SEMI ACOUSTIC MODELSFor Yamano Gakki Epiphone Japan from 1987 to approximately 1997, the serial numbers are in a YCPPP format.

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.

The pattern is as follows: YDDDYRRR YY is the production year DDD is the day of the year RRR is the factory ranking/plant designation number.

Prior to 1984 when the Kalamazoo, MI factory was closed, the numbers 001-499 indicated Kalamazoo production.Examples - 9 xxx = 1989 (4 digit number beginning with "9" used only in 1989) 0 xxxx = 1990 9 xxxx = 1999 00xxxx = 2000 05xxxx = 2005 Those beginning with "94": In 1994, Gibson's Centennial year, many instruments have a serial number that begins with "94" for the year, with the remaining 6 digits indicating the ranking number. FYYMMRRRR F= Factory code (this can be 2 letters as well) YY= year of manufacture (this can also be just 1 digit for '90s models) MM= month of manufacture R= ranking number (may be more or less digits, not necessarily indicative of total units produced) Example - S02021234 was issued in Feb. Another code used on some current Epiphone models FYYMRRRR F= Factory code YY=Year of manufacture M= This will be a letter code corresponding to the month (A=January, B=February, etc...) RRRR= ranking number Example - R03D0263 was issued in April 2003.Epiphone Elite/Elitist models FYSSSS F= Factory Code (this code will be an "F" or "T") Y= Year of manufacture (2 = 2002, 3 = 2003, etc.) SSSS= Sequential Serial Number Example - T41234 is a 2004 Elitist model.he easiest way to find the year of manufacture of a particular Gibson guitar is to reference the instrument's serial number of factory order number.In the 1970s, Gibson standardized the serial number system that is still in use today.RRRR = production number CZECH REPUBLIC: B= Bohêmia Musico-Delicia KOREA: I= Saein, U=Unsung, S=Samick, P or R=Peerless CHINA: DW=Dea Won, EA=Gibson/Qing Dao (Acoustic guitar), EE=Gibson/Qing Dao (Electric guitar), MC=Muse, SJ=Sae Jung, Z=Zaozhuang Saehan, BW=China UC=Unsung China MR = Mirr factory JAPAN: No letter or F=Fuji Gen, J or T=Terada INDONESIA: SI=Samick (Bogor factory) This newest serial number system used by Epiphone is not yet completely deciphered.' F' doesn't refer to ' Fine, Korea' - nor to ' Fuji-gen, Japan' - New "F" models are made in China.