Thank you for the clear base pics! I'm going to respectfully disagree with what SPC stated earlier in the thread-your bottle dates between the late 1880's and the early 1900's. Here's a few bottles dating from roughly the same era of yours that I have in my collection- an Old Dr. Solomon's Rheumatic Drops and Dr. Daniel's Carbo-Necus (it's far more present in the Solomon's):A couple more photos of the bottom. Sorry for the delay!