Thanks for the info. The bottle is from Madisonville texas. You are correct. The bottle itself Is another I can find no information on! I will share some pics. Thanks for your infoCheck out Knox glass article from SHA. PA company that used a K in a keystone and as they grew snd bought other plants in PA and other states, put diff letters inside the keystone. T in a keystone is likely from Palestine TX plant. Looks like 1953 bottle. Interesting history of the firm.
View attachment 232083