Was this 1989P Washington quarter a variety of error quarter? Reverse right side split leaf tip & left side sharp hook leaf tip,weak strike on the top one arrow & a special sign on the middle arrow head.
That's the one I have found in my more than fifty supermarket toonie change,the other toonies had the security edge were all with the upward letter face to the reverse side.
If it's not RPM-002 then I think it should be another RPM variety. In my opinion the first MM punch was weak so the MM device showed slim, then the repunch MM was a broken die so the middle section of the MM was being thick and wide.
That's really a valuable lesson to let me know the difference between machine doubling and the hub die doubling.Very appreciate for your professional and educational explanation!