The violin shaped Gibson EB (electric bass) debuted in 1953 and it was known as simply the Gibson Electric Bass until it was renamed the EB-1 in 1958. There was another model that was simply referred to as the EB in the 1970 Gibson catalog. It had an SG shaped body and was described as follows in the 1970 catalog:

EB—SOLlD BODY. This exciting new addition to the Gibson line meets all professional standards at a very popular price. The custom contoured double cutaway design makes for smooth, easy playing.

FEATURES: Thin double cutaway. solid body design. slim, fast, low-action neck joins body at the 15th fret. Laminated neck. adjustable truss rod. rosewood fingerboard. pearl dot
inlays, combination bridge and tailpiece.» powerful humbucking pickup with adjustable pole pieces, separate tone and volume control. 13" wide,16" long, 15 5/16" thin, 30.5" scale
length. 20 frets.