Here is a few pics of a Case blade for sale here but it dont look like the one I have. The bracket on this one looks a lot smaller then mine. Is this for a different application other then the 200 and 400 series tractors?
CM2 is correct. That's a G-51 blade in rather remarkable but incomplete condition for something that only fits early 70's lawn tractors......not GT's. That blade was for the 107, 117, 108 and 118 models.