Introduced in 1937, the RB-75 offered banjo players the same elemental Mastertone quality as the earlier RB-3. In the 1970s, J.D. Crowe used an RB-75 to establish his unique banjo style, and today's RB-75 Crowe replicates J.D.'s famous banjo, including the RB-75's tone ring, with lighter weight and slightly different shape than the standard flathead style.