Ummm, I don't mean to knock the instrument (which may well be utterly wonderful to play!) but I think calling it a "new Kay Albrecht box" might be stretching it a bit Malcolm.
The listing only claims "This melodeon is manufactured in collaboration with Kay Albrecht", and there's nothing to say that Kay actually made any of it - nor does it have "the look" of one of that he did.
I'm also a bit surprised to see the anchor emblem on it, since that used to be a Hohner trade mark on accordons (which, as the "double anchor", they acquired with Kalbe in 1912), but I guess it's no longer in use by them...
By the way, both the eBay listing and the Fraton Accordions website get Kay's web address wrong, which is (of course!)
https://aaccordion.com, and not aaccordions.com.