Questions about small Armstrong Cork bottle

I found this small bottle in my backyard today. I have found that it is from Armstrong Cork Co. I am wondering what the numbers mean, what 4-S DR. means and what year this was made?
Found in .CA.
Bottle marks are 4-S DR.
7 and 9

Comments

  • Unfortunately not a lot is known about mold markings for most companies. About the best you can say is mid 20th century, and likely your bottle was used for pills

    I generally guide people to look for labeled examples to get a sense for what the container was used for and also for determining age. It can be time consuming to find such examples (I like ebay for this research) but it can reveal a lot of clues.
  • Thank you! I have been doing deep Google search on it and I have only found 1 that looks exactly like it but the label it has is a fake label for selling. (I will try to add the picture below)
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