I had one of those. Bought it new in 1976. Never could wear it out, and it sawed wood to heat two homes for 25 years. I gave it to my son, and he still uses it. They don't spin as fast as a Stihl, but they sure are reliable and tough.
You've taken good care of that saw, ours has very little paint left on it.
Our local Stihl dealer could get any part I needed for ours.