How's your Russian?
I always thought Cherkess used 1 row diatonic accordion, so the keys are not imperative. What may be more important is to have that wall of sound, only accordion can give. And 1 row is small and portable, easy to play. It was a surprize to find so many Youtube videos with Piano Accordions.
I think all concertina typs may be used, if you don't mind compromized volume.
What exactly are you going to do with it? Like accompanying singers, dancers, self-enjoyment, playing at parties, performing onstage?
I'm not from russia(Cherkess are scattered in many countrys since the war in Caucasus).
anyway i'll be just useing it for self-enjoyment but I don't want that I cuoldn't play the songs for other people(like in a wedding or something) just because the sound of the Concertina dosn't match to the sound of the accordion/piano acoordion so can the Concertina and the accordion sound match to each other?
I'm just interested about the Concertina because it looks cool.
Thanks for the help.
p.s:songs can be played by a 1 row diatonic accordion or with a piano acoordion.