I bought 6 chainsaws for $35 at a yard sale this morning. 2 Husky, 2 Stihl and 2 Partner. The only 2 that have model #'s are a Stihl 028 and a Partner P55. There is a large Husky that has to be 75 or 100 cc. There is a a Stihl 051 filter cover that fits the big Stihl saw for 3 screws but one screw hole is out in space. So my question is: Is there any wayto identify saws that do not have a sticker or plate? I'm pretty sure that some parts fit multiple saws, so part numbers might not help. Any advice?