Funny you mentioned Button Box. Reason why I asked about the Regal is that Button Box has one in G for sale. If anyone needs a G for not too much, there it is.
My first box after my 1915-1920 no name Sharped Bb Saxon box was a Galotta...same box we are discussing.
I played it for about 2 years. I sold to a guy in Virginia who then sent it to Jude Moreau to have the hair pin springs traded out for coils and some retuning.
The slides were made from a milky white plastic and tended to curl with age. The box materials were spruce, pine and beech. Always painted black. The tin corners and other metal hardware were cheap. Lots of sloppy glue glops internally and lots of wood slivers and frayed edges. The reed bloks were "expedient".
But it played well.
What ever you do do NOT buy any Chinese made accordion. Not that they might not have the skills, it's the cheap Botards in the US that order them and insist on the lowest prioce which means the cheapest materials and sloppy workmanship.. And yes they can be tweaked but not worth the time.
It is my opinion that if a country does not have an accordion culture and the makers don't have any experience playing them.. to them just might as well be galvanized buckets or Gnome Lamps.