That is a very nice planter. Looks like no wear at all on the sword and this is the first time I have seen a 184 with a fertilizer hopper mounted. I don't have a manual that shows the parts breakdown for that option. For a while IH decided that everything needed to be in separate catalogs and in this case the fertilizer parts are in FU-1.
At least they did not come out with a second edition ( I hope)