Gibson L-4 refers to several archtop guitars produced by the Gibson Guitar Corporation.The L-4 was first introduced in 1911 as an acoustic rhythm guitar with an oval sound hole; it was used by Eddie Lang, who also played an L-5.During the 1930s, the oval sound hole was replaced by two f-holes, similar to those found in other archtops such as the L-5 and the Super 400.In 1949, Gibson released the ES-175, which was essentially an electric version of the L-4 with a laminated (as opposed to carved) top and a florentine cutaway.