As rough a shape that this old saw is in, it still runs well and can cut but not when the bar is worn. I took a few measurements and pictures along the way to compare the old and new. Click on any of the images to see a larger one.
Even with my eyesight, its easy to see the bar is worn. I dug out the calipers to compare the differeneces.
Here we can see the bar is well worn, compared to the new.
Even with a broken gas tank handle, this chainsaw with a new bar works great.