What kind of accordion is this?

[acctech]

 ???I found this in the depth's of You Tube. Very odd construction. It seems to be diatonic, sounds like it's tuned to a natural temperament, and has a most unusual bass/chord arrangement. Some might find the sound obnoxious, but I think it sounds great. Anyone who might be able to shed more light on this? Please post. Thanks - Tim
http://www.youtube.com/watch?v=dg7W2JKQXLY

[acctech]

Half an hour later and all Googled out, I found some more information: http://www.folk.ee/kultuurilaegas/en/aai_index/rpi_pillid_ja_muusika/rpi_rahvapillid/rpi_l66tspillid/rpi_eesti_l66ts

[Chris Ryall]

There was a Finn playing a diato with a similar bass at Kaustinen Festival (Finland) last summer.  The right end was AFAIR in G/Em. Didin't really fathom the chords on a brief 'go' but they were sort of all for those keys (as expected) with many in both directions.  

Estonia is but a few hours across the Gulf of Finland from Helsinki by ferry, their languages are connected, (though the vodka is a lot cheaper).

[ukebert]

Lots more here: http://forum.melodeon.net/index.php/topic,1781.0.html