An immaculate condition, fully working vintage Boss Dr. Rhythm DR-55 analogue drum machine. Your purchase will include: 1x excellent full working condition Boss DR-55. All pots, buttons and ports are fully functional and the battery compartment is clean from any leak residue (see photos). The Boss DR-55 Dr. Rhythm is a vintage analog drum machine released by Roland / Boss between 1979 and 1980. It holds historical significance as the very first programmable step-write drum machine in the highly successful Dr. Rhythm series. Primarily aimed at home practice and guitarists looking for a simple rhythm accompaniment, it quickly became a cult classic in early electronic, synth-pop, and post-punk music due to its distinctively raw, dark, and punchy character.