Gibson B series

The Gibson B series was a series of acoustic guitars manufactured by Gibson Guitar Corporation between 1961 and 1979, and as a reissue to a limited degree from 1991 to 1992. The series consisted of the three different models, the B-45, the B-25, and the B-15 (the Blue Book also lists a B-20, with a run of 500 units). The B-45 was only available as a 12-string edition; the B-25 was available as a standard edition, a 12-string edition, and a ¾ scale body edition; and the B-15 was only available as a standard edition.

B-45

The B-45-12, a 12-string edition guitar introduced in 1961, was the first B-45 model guitar available and the first B series overall. The B-45-12 had a mahogany body and neck, spruce top, rosewood fingerboard, and a cherry sunburst finish, and was made with "round" shoulders for the 1961 – 1962 model year and "square" shoulders until the end of its production in 1979. Starting in 1963, the B-45-12-N was also available as a natural finish edition.

From 1991 – 1992, Gibson manufactured a reissue of the B-45-12 with rosewood sides and back.