The bottle also does not have a ground down surface on the top of the finish.
This yields a "YES" answer to Question #2 and we know that this is a narrow mouth/bore machine-made bottle which very likely dates no earlier than 1905 and probably 1910. (Note: This section of the dating key is a series of independent questions where the answer to any given question is not dependent on the answer to another; a user may view the questions in any order.)In reading through "B", there are a couple other options available to help refine the dating a bit.
The makers mark cinches the date in the 1940s of course, but without this marking the bottle date could not be refined further.
have the distinctive "Diamond-O-I" marking just under the "7".
(Note: The "I" can appear as a dot in the middle of this mark like with this bottle, though on most it is a more or less distinctive "I".)Reading down through the narrative in Question #11, we find out that the number just to the right of the Diamond-O-I mark is the last two digits of the year the bottle was manufactured, which on this bottle is a "46".
One of the top returns on the search list would be the "e-Book" entitled Bottles on the Border: The History and Bottles of the Soft Drink Industry in El Paso, Texas, 1881-2000.
This e-Book is now posted on this website and contains an extensive amount of information on soda bottles in general as well as specifically to those used in West Texas.
Looking at the two options under Question #8, it is clear (no pun intended) that this bottle matches refinement #2 which makes it highly probable that this bottle dates after 1920 and but probably no later than the 1960s.