I myself would call the center weight, a starter weight. The others are normally called suitcase weights. Remove the outside suitcase weights on one side to get the part number off of the center one. I don't know if it's located in an indentation like the number on the suicase weights or not. P/N on the suit case weight is 47056220, located in that indentation. Case/IH describes those as 85 lb.weights. Case IH / New Holland: WEIGHT, Part # 47056220
A little pricier than the standard suit case weights, which normally fetch $1/lb. New from Messicks shows $215 ea.,while used at some salvage yards seem to be $225 ea.
If you look up the tractor model in the parts lookup on Messicks or the Case web site, there may be parts drawings for those weights. If they are there then it should include a description and/or name for each part.
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