Some months ago, Lester Bailey posted the below video as a submission for the June 2011 Melodeon.net tune-of-the-month, the tune "Lemmy Brazil's No. 2." I've come back to it again and again, ever since. Played on a plethora of Hohner accordions, Lester's vid gives a great sense of the range of sounds the might Hohner brand has -- all of them happy making.
And as a bonus, also from Lester, a pin up of Lementina Brazil herself!