Yes, beautiful with all these engravings.

"Galerie 4" ("Galeries... à voir") of this small shop is a virtual accordion museum. It has some beautiful and sometimes strange-looking old instruments:
http://www.boite-accordeon.com/index2.html

Excellente adresse. J'y ai fait réparer mon Acadian. C'est assez cher, mais le travail est de qualité.
Il importe aussi des Jr Martin !! On peut les essayer.

Marc.

There's a Dutch builder Noud Martinali, who build spoon-bass accordions with two rows. At link#2 you can watch one played by Mark Sohngen. There's no website from the builder as far as I know.

Je partage ton avis. J'ai acheté l'un des miens chez lui.