Thanks for the pic's of your treble pallets. The accordion will still need a hands on inspection for a correct solution.
This one is a decent little box when in shape and is worth some time & parts to repair. If I may, take a guess at your
problem I would say it's your treble pallets leaking air. A fix can be done yourself and may I suggest you give this a
careful read. ----
Check out http://accordionrevival.com! AccordionRevival.com How to repair accordions, make accordion repair tools, find and repair air leaks, change leathers, wax reeds, voice reeds, level keyboards.
accordionrevival.com
It will give you a detailed fix and solution to your problem.