Of all the bottles I looked at,
I probably liked M56 the best. Embossed with Swift’s Pharmacy, this medicine bottle even has the address on 2nd and Pike Street, Seattle Washington, so if I take this bottle’s word for it, it’s obviously a bottle for medicine. Even without the embossing, the flat lip is indicative of a prescription bottle so you can tell based on that right away. On the bottom of the bottle is the maker’s mark of W.T. Co which according to Society for Historical Archaeology’s bottle typology website, dates the bottle from 1901 to 1924. I’m not certain when it was dumped, but it may have been towards the of the dump’s life in 1925
By the seams on the side that run all the way through sides, and what I assume on the shoulders are seams, I can only imagine that this was molded with a 3-piece mold, one for the top, and two halves for the body. But looking at it again with the seam running all the way to the lip, it’s probably more likely a 2-piece mold.
A search of that intersection on the internet will put you a street over from the Gum Wall and right next to Pike Place. Clearly it’s not there anymore and has since been replaced by bigger chain pharmacies like CVS and a Walgreens a block over and around the corner if Target isn’t your fancy.
By sheer coincidence, while googling the place I happened on an ad and to my dismay, just took me Professor Gonzalez’s blogpost on this same bottle. Since it’s already on the blog you can just read her post here: