So a customer of mine has two old coke bottles she's found, or were given to her I'm not sure, but she offered to give em to me, I just haven't got then yet! So last time I was at her house I noticed something! Please correct me if I'm wrong, but I was under the impression that the older cokes were "Christmas" cokes with the Dec 25 date, then they went to the D-Pat's? Is this not correct? She has one that doesn't have "Dec 25" or "D-Pat....."?? Just says "trademark registered with US patent office" on one side, then "trademark registered, net contents 6 1/2 oz"?? It's from Natchitoches, La (pronounced nak-a-tish) and the date code read 58-99. Is this bottle anything special, or was my initial assumption of the bottles going from Christmas to D-Pat wrong