GIBSON made the B-25-12 between 1962 and 1977. It was a traditional grand concert size instrument offering fine resonance and response, Gibson quality and workmanship at an relatively affordable price. It featured a selected two-piece spruce top, Honduras mahogany back and sides, ivoroid binding and ivoroid soundhole purfling ring. The twelve-string, fast, low action neck was made of one-piece mahogany and fitted with an adjustable truss rod. The B-25-12 had a special adjustable twelve string bridge and tailpiece. While the early B-25-12s had a trapeze tailpiece, this was replaced in 1963 by a strings though bridge and again in 1970 by a standard acoustic pin bridge. Tortoise shell pickguard. Chrome-plated enclosed machine heads. Grand concert size and shape: 14.25" wide. 19" long. 4.5" deep: 24.75" scale length 20 frets. The Gibson B-25-12 came in cherry-sunburst finish (discontinued in 1970) or as the B-25-12N with natural top with cherry finish back and sides (discontinued in 1977).