Gibson instruments signed by Loar now are among the most prized and celebrated in stringed-instrument history. Perhaps the most revered instrument from this period is the F5 mandolin, but probably the more broadly influential was the L5 guitar, which remains in production to this day. The mature Gibson archtop guitar and its imitators are regarded as the quintessential "jazzbox." Archtop guitars were subsequently made by many top American luthiers, notably John D'Angelico of New York and Jimmy D'Aquisto, William Wilkanowski, Charles Stromberg and Son in Boston, and by other major manufacturers, notably Gretsch and Epiphone. In Europe, companies such as Framus, Höfner, and Hagström took up the manufacture of archtops. Archtop guitars were particularly adopted by both jazz and country musicians, and in big bands and swing bands. Gibson's ES-150 guitar is generally recognized as the world's first commercially successful Spanish-style electric guitar. The ES stands for Electric Spanish, and it was designated 150 because it cost $150, along with an EH-150 amplifier and a cable. After its introduction in 1936, it immediately became popular in jazz orchestras of the period. Unlike the usual acoustic guitars utilized in jazz, it was loud enough to take a more prominent position in ensembles. Jazz guitarist Eddie Durham is usually credited with making the first electric guitar solo, but it was ES-150 player Charlie Christian who popularized the jazz guitar as a solo, not just a rhythm, instrument. The ES-150's top was not carved on the underside, making it unsuitable for acoustic use. In 1951, Gibson released the L5CES, an L5 with a single cutaway body and two electric pickups, equally playable as either an acoustic guitar or an electric guitar. This innovation was immediately popular, and while purely acoustic archtop guitars such as the Gibson L-7C remain available to this day, they have become the exception. In 1958, the L5CES was redesigned with humbucking pickups; most, but certainly not all, subsequent archtop guitars conform loosely to the pattern set by this model. The electric archtop was particularly popular with jazz musicians Tal Farlow, Barney Kessel and Johnny Smith. Other manufacturers introduced electric archtop guitars, notable examples including the Gretsch White Falcon and various Chet Atkins models. Some of these instruments have a distinctive "twangy" sound and were taken up by country music and early rock and roll artists such as Duane Eddy and Eddie Cochran. Similar models remain popular in rockabilly. Gibson's