One thing that may simplify things. From what I've seen, and I don't have anywhere near as many caps as others, is that the lining is consistent for each bottling plant.
For example, and I'm using baseball because that's what I have the most of, if say the bottling plant is Boston, Lynn all the caps from that plant have the same liner. If it's Boston, Braintree the liner may be different, but all the ones from that plant will be the same. (With a very few exceptions, I have one from a plant that usually has a clear liner but it's got a heavy blue tint. It appears original, but I'm not 100% certain it isn't stained from something.
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