Not a joke , I owned the identical box in purple with red white and blue bellows and a case with a green fuzz liner.

I sent it to the well known player/builder/repairman and seller of accordeons in Wales.. Rees Wesson. He plays it at "sympathetic" events.

PS Check's in the mail for 25 cents for using "paradigm"... even though Sterling and Monarch were not in biz until the 20th Century, not 1829 when an Armenian immigrant to (Bohemia) Austria "invented" the 10 button accordeon (bisonoric, diatonic, aerophone) the mother of all 1 row 10 button accordeons to follow and every other bellows/reed instrument thereafter.

Thought you might enjoy seeing the keyboard of one of the local musicians.
He brought the accordion to me for a complete overhaul a few years back and this is what the keyboard looked like when he gave it to me.

Copper wires, steel wires, aluminum wires, gobs of epoxy, you name it.
BTW, this was an old Marc Savoy accordion that originally had copper alloy wires.