endorsed Gibson guitar, and a high-end, deep-body version of L-1 (about 4½" to 4⅜" deep). The design changed a lot during the years of its production, until its discontinuation in 1941. L-20 In 1993, Gibson made a special variant of L-00 or Nick Lucas model, namely L-20 Special. This model has rosewood back and sides, with transducer pickup. Discontinued in 1994. There is also a L-20 Koa International Special model, with Koa back and sides, being made in the same period. The LG series The LG series were introduced in 1942, with a starting line-up of LG-1, LG-2 and LG-3. However, LG-1 and LG-3 stopped production almost immediately after their debut, until they were re-introduced in 1945. In 1958, LG-0 was also introduced as the low-end model of the series. All these models are 14 ⅛" wide, with mahogany back and sides (except for some World War II models have maple back and sides). LG-0 and LG-1 has mahogany tops with ladder bracing except the '42-'43 LG1, while LG-2 and LG-3 are spruce with X-bracing. LG-0 and LG-1 discontinued in 1974, LG-2 and LG-3 were replaced by B-25 and B-25N in 1962. The LG series are narrower in the lower bout comparing to the L series, but have a much wider upper bout. In 1949 Gibson produced a run of the Hawaiian variant, HG-2. A 12-string variant, LG-12, was also made in 1967-1973. The B series LG-2 and LG-3 were re-introduced as B-25 and B-25N respectively in 1962. B-25 has cherry sunburst finish, while B-25N has natural finish. Late models of B-25 and B-25N have adjustable saddles equipped, just like many other '60s Gibson acoustic guitars. Both discontinued in 1977. The 12-string version, B-25-12, was also made in the same period There were also two lower end models, B-20 and B-15. B-15 was produced during 1967-1970. It was listed as a "student model" by Gibson, with spruce top and laminated mahogany back and side. B-20 was produced during 1970–1971, with solid mahogany back and top. It's worth mentioning that there is also a model B-45-12 in the B series, which is actually a full-size round-shoulder dreadnought, like the J-45, and only in 12-string version. LG-2 ¾ and B-25 ¾ In 1949, a ¾ scale variant of LG-2 was produced. After being replaced by B-25, B-25 ¾ was also produced. A few ¾ scale variant of LG-1 was also produced. Tenor