We specialize in older jonsered chainsaws. We can identify your old jonsered chainsaw if you don’t know what it is. Tons of parts for the older all metal constructed models of jonsered. 50 51 52 52E 49sp 521 621 70E 80 90. We also have used chainsaw parts for newer turbo models and models from the 1980’s like 520 sp and 510 sp.