Epiphone 5102T / EA-250

An archtop electric guitar manufactured by Matsumoku and sold 1970 to 1974 or '75 in the United States under the Epiphone brand.

Gibson, the owner of Epiphone since the late 1950s, abandoned manufacturing of Epiphone-branded instruments in 1969 and started importing Epiphone-branded instruments from the Matsumoku company in 1970. These instruments were not based on previous Epiphone or Gibson designs. [1]
The 5102T was among these first imported Epiphone instruments. It came in one color--redburst, had a maple laminate body (nearly hollow: just a 3/4" square block from top to bottom below the bridge), maple bolt-on neck, two doublecoil pickups with black plastic covers and "staple" poles alongside screw poles, and a vibrato operating similarly to a Bigsby vibrato.
In subsequent years changes were made: the pickups became more like Gibson pickups and gained chrome covers, a trapeze tailpiece became available, the "pitchfork" Epiphone logo was added to the pickguard, and in 1972 the model designation was changed to EA-250. There was during the same years also a companion short-scale bass, the 5120 / EA-260. In 1975 or '76 the guitar was replaced by the ET-255. [2]

References

1. [http://www.amazon.com/Complete-History-Epiphone-Walter-Carter/dp/0793549485 Walter Carter, "Epiphone: The Complete History" (Milwaukee: Hal Leonard, 1995), pp. 73-76.]
2. Carter, pp. 123-127 (1971-73 and 1976 price lists). [http://www.matsumoku.org/models/epiphone/catalogs/catalogs.html 1974 Epiphone catalog]