Old wind instrument, enjoy listening to up to 12 different tones, blow quickly from side to side to produce a hoarse to shrill sequence.

It is recommended to print it upwards so that the blowing area is well, but if you have good refrigeration can also be done flat, being faster printing.
Memories of those sharpeners who worked in the villages.

(Sorry for the quality of the print, I will never buy recycled filament again.)