Barrel organ, proper function of bellows is checked with driving crank, final adjustment, Grassau, Upper Bavaria, Bavaria, Germany, Europe

Barrel organ builder, workshop, man blowing into sound post, checking tones with his mouth, Grassau, Upper Bavaria, Bavaria, Germany, Europe

Barrel organ, bellows part, plywood board with vents, covered with leather strip, valve, Grassau, Upper Bavaria, Bavaria, Germany, Europe

Barrel organ, bellows, plywood, vents, covered with leather pieces and strips of cardboard, valves for suction and exhaustion of air, Grassau, Upper Bavaria, Bavaria, Germany, Europe

Barrel organ manufacture, metal reeds connected to wooden valves, Grassau, Upper Bavaria, Bavaria, Germany, Europe