I recently picked up a Partner 500. It's actually cleaner than the 5000+ I posted pics of a couple weeks ago. I pulled the cylinder and it still has the crosshatch all the way up. The piston still has the horizontal machine marks. It does not appear is has ever thrown the chain. I believe it's very low hours. I'm really liking these saws.
Here is pictured with it's big brother.
Here is pictured with it's big brother.