Gibson created the EB (electric bass) series to compete with the Fender Precision & Jazz models in the mid '50's. The EB1 first appeared in 1956. It's violin inspired contours appeared very similar to the classic hofner bass models popularized by the Beatles. The EB2, a semi-hollow body bass was introduced in 1958 and featured rounded Les Paul like contours. This was probably due to influence of the ES335 which was introduced at the same timeframe. Gibson's introduced the EB0 in 1959. The EB3 appeared in 1961 and was a deluxe version of the EB0 with an extra bridge pickup which gave it a much brighter sound.