Necked dating pic

As the information under this question notes, ACL's in the U. date no earlier than 1933 and are still being made though most American soda bottles with this feature are from before the 1980s.

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-The glass is clear (colorless) with just the slightest "straw" tint when looking through the thick portion of the base.

So at this point we know that this bottle was made in 1946.

A user need go no further through the Dating page questions to refine the date further.

The picture to the lower right is a close-up of finish of the Mission bottle.

It shows that the side mold seam does go up to and through the finish/lip all the way to the top of the bottle.