HELP with vintage dr pepper bottle

[Amaxwell]

found this bottile in October when I was fishing on the cahaba river. on the bottom the numbers are 9 on the left side, and 4 7 on the right side. can anyone tell me roughly the year it was made and maybe the value?

 

[unclemac]

that size and makers mark say 40's early 50's to me...value is in the eye of the beholder on that one.