interesting, i like the way you have worked with an un-conventional colour here. there are like loads of brands that simply try to make their concertinas look like originals sticking to the design, (im not slagging them of for this, i actualy think its great to see things like it in modern society and they look great) but its nice to see things like this, as its in a way rather modern. Also good work on the fretless concertina, i like that idea too.
theres some nice idea's in the US, i think theres also that guy who makes square concertinas in the us (at least thats where i think hes situated) keep up the good woyk!