This is an electronic Hollowchisel mortiser from Jonsered, manufactured in the 1920’s. You use it for instance to woodworking joints. During the sound recording we drilled in pine, holes of 10*10 mm. Now days you can find it at Skansen In Stockholm.
Sound level peaks at 72 dB
Sound recordist: Torsten Nilsson
Photographer: Torsten Nilsson
Video recordist: Torsten Nilsson