Gibson introduced the B-25 in 1961 which featured a mahogany body (solid back, laminated sides), solid spruce top, and rosewood fingerboard like the B-45. The B-25 featured a smaller body than the B-45 and after 1965 they had a narrow neck (1 5/8" nut) while the earliest models had the standard 11/16" nut. Many came with a plastic bridge and ceramic adjustable saddle. Some B-25's had a cherry sunburst finish, but there were a limited number of ebony finish editions with white pickguards. There was also a natural finish B-25-N edition. Production of these standard B-25's ended in 1977.