For those who have not actually had one in hand. Firstly, they are very well made and depending on the builder, they are somewhat smaller than La built accordions. The treble keyboard is more like a modified Hohner keyboard in being that it is a shell with the wooden part of the valve arms hidden below the face of the keyboard. For the most part the bass box is the same as a La. box. The large majority don't install registers at all. The treble face plate is usually solid wood 3/16" thick. Air holes in the face plate on most are 7/16" in size on 3/4" centers. They usually have the standing reed blocks removable and sometimes with some builders all the reed blocks are standing and removable. Many make their own bellows. Treble valves are most always varnished natural wood and some use wooden buttons. Ebony etc. Finish on their accordions is very good. Ouilette ( Melodie) accordions and his brotherinlaw also make furniture so have a complete woodworking shop and spray booth for use in making accordions. Tuning is completely different than La boxes. The accordions are loud but harsh sounding. Not suitable for cajun music if you want to sound traditional. Even with retuning, IMHO, they would not sound very cajun, for lack of a better term. With no registers and being smaller they are lighter. Treble keyboards are fast and could easilly be used on La. made accordions but would those playing cajun music accept them.????? Many Quebec builders don't use metal corners and some don't use bellows straps but use an inside hooking system found on some piano accordion.
These observations were made while exhibiting my accordions in Quebec and repairing Quebec accordions. Unfortunatlly I no longer have the specs. but these are well made boxes. The style could be adapted for La. made accordions but would they sell. It's seems that those interested in cajun music want traditional looking accordions.