Video of Lars Ek showing Pietro Frosini bellow technique. The first tune is (0:40) "Bel fiore". The second one is (2:50) "Silver Moon Waltz". At this video was used original Pietro Frosini accordion build in 1927.
Free accordion lesson by Shelia Lee: how to learn your accordion reeds, pitch and air required to get the reed to fully sound, difference in the response for out or in bellows.