Thanks for posting and including a super photo of the base.
You can see the patent for this bottle design here: (although the design does not match anyway near exactly)
https://patents.google.com/patent/USD95464S/
but it does help us date the bottle.
I answered the question of what this bottle contained (Calvert Whiskey) with a photo here:
https://forum.antiquebottles-glass.com/discussion/comment/4443#Comment_4443