Hope you're feeling better & better. I did find this page, which indicates a whole buncha lawyers were involved long about 1950. They must still be involved as you gotta pay to read more...
I have several of those bottles, my wife uses them as christmas decor along with the Trick or Treat bottles for halloween. What I would LOVE to find or even see is a Santa Cola sign. If anyone has one send me a picture.[:-]
Actually one of those just sold on ebay attached to the letter sent by the soda company it belonged to. Turns out it was a B-1 cap. They also had a Davy Crockett cap. I thought about bidding on it but passed. Not sure what it sold for, but the Davy Crockett seemed to have done well.
Just for the record, I thought I'd share this photo of what a B-1 bottle looks like. I thought it was interesting because of the combination of Christmas colors, Red & Green. It's not my bottle, but the information associated with it said this particular example was from 1947. []