Just reading back thru an earlier post with regard to the 9C plates with blades on the top for grass blowing . From memory there were 3 different sorts of blades fitted on the top .1 type for side throw mowers with side catchers and 2 different types for rear catchers .
With regard to the Discs with 8 holes they were an aftermarket disc and I found about 3 during my rummage thu the discs at the farm earlier this week Cheers Joe B


Joe