1915 Coke NY Root Co

[Book N Curio Shoppe]

I have an old Pat'd 1915 bottle with New York on the bottom and " 160 Root 31" on it I know the Root refers to the bottler, Root Co. I did some research and couldn't find the value posted for NY bottles. Many other city names but never a mention of NY. Help?
First photo of bottom
Thanks! CSJ

 

[Book N Curio Shoppe]

here is face of Coke bottle...needs more cleaning!
CSJ

 

[Book N Curio Shoppe]

Thanks Greg!

I found out from another source that the "Root 160 31" found on the heel is broken down into the Bottling Co. (Root, as you said) and the three digit is the mold, the 2 digit is the year. But I don't understand if the year was 1931 then why not use the mold that shows the patent from Dec. of 1923 ?

Thanks, CSJ