u/Electrical-Pea5824

I just picked up my great grandfather's old Case tractor. Its been sitting in an old barn for like 30 or 40 years, so it needs some work. It looks like the number plate says "VAI". Tractor data says the VA (standard) is 3200 pounds, and the VAI (industrial) is 2550 pounds. That seems like a big weight difference. Is that a mistake? If not, what is the difference that takes almost 700 pounds off of the VAI? Pictures attached.