Hi, I recently got for free an older craftsman chainsaw. It is red with an 18" bar. It is in excellent shape. I was wondering if anyone knows about these saws. The unique thing about the saw is that there is an integrated chain sharpener built right onto the side, near the sprocket. It has a little black lever that you move to sharpen the chain ( I assume with the chain spinning)?? I can post some pictures if someone thinks they know about these saws and what it may be worth. It runs fine and is in excellent shape. It is a 1970-ish model. I got it from my boss who got it from his father in law. He purchased it new around 1969-1971. Thanks for any info!