Thank you, Fred, for your comment and your welcome!
My research shows that approx 1920, the US passed a tariff law requiring country of origin labeling on imported items. So I'm speculating the bottles marked MADE IN GERMANY were manufactured around or after that date.
Seeking bottle information. I purchased 80+ bottles (apothecary?) at a local estate sale. The bottles are nearly identical to each other, but have some different (3) manufacturers markings on the bottom. I drew an example of each markings on last pic. Are these authentic or repro? Estimated age...