I'm looking on info about the AC&F multi compartment 'tank' cars built to haul chlorine in the late 1940's and early 1950's. I say 'tank' car because they look like flat cars with round tanks bolted across them instead of actually looking like a conventional tank car. SHPX (220-229 and 400-414 lettered for private owners) and GATX both owned some. I'm trying to find any pictures I can find as well as any other information. Thanks for any help...