Boston 131 machine heads for classical guitar with mother-of-pearl buttons, nylon axle, 3x left + 3x right, 70mm, nickel

Boston 131-B Classical Guitar Tuning Machines - Nylon Shaft, Nickel Finish, Butterfly Buttons

Boston 131-BG Machine Heads for Classical Guitar - Gold with Nylon Shaft

Boston 131-G Machine Heads for Classical Guitar - Gold Finish with Mother of Pearl Knobs

Boston 131-P machine heads for classical guitar - Nylon shaft, 3x left + 3x right, 70mm, nickel, pearloid knobs

Boston 131-PG Machine Heads for Classical Guitar - Gold with Pearloid Knobs

Boston 132-PBE tuning machines for classical guitar - nylon shaft, 3x left + 3x right, 70 mm, mother of pearl, black engraved

Boston 133-IM machine heads for classical guitar - nylon shaft, ivory knobs, 3x left + 3x right

Boston 142-10 machine heads for 10-string guitar, nylon shaft, 100mm, plastic buttons

Boston 155-LR Machine Heads for Classical Guitar - Nylon Shaft, 3x Left + 3x Right, Plastic Knobs

Boston 194-BL locking machine heads guitar, die cast 6L, low gearing 19:1, black

Boston 194-BLR locking machine heads guitar die cast 3L3R, low gearing 19:1, black

Boston 194-CL locking machine heads guitar, die cast 6L, low gearing 19:1, chrome

Boston 194-CLR locking machine heads guitar die cast 3L3R, low gearing 19:1, chrome

Boston 194-GL locking machine heads guitar, die cast 6L, low gearing 19:1, gold