Hi, MD.
Very attractive.
I suspect it may be two treble/two bass (LM) reed instrument from the early 1950s exhibiting "ambitious " registrations.
The styling is too "rounded " for the 1970s.
Accordions tended to echo the motor cars of their day in overall stylistic influences.
There's one caveat that applies to these instruments with transparenty-gold glittery keyboards and bass buttons: pretty though it may be, the glittery material can sometimes be rather unstable and crumble away.
Good luck with it anyway!