I have a pontiled Gilbert & Co. wholesale druggist Philada. Your bottle could be what Gilbert & Co. turned into later. I'm not sure but I think the Gilbert bottles are fairly common Philly meds
i'm travelling at the moment and dont have my normal resources but I think I remember Gilbert being with Royal possibly right after the civil war into the 1870s
Last time I was foolish enough to add them all up, Philly was close behind NYC and no other cities came close...
Top Ten Cities for 19th Century medicines
New York City 15%
Philadelphia 12%
Boston 4.2%
Baltimore 3.9%
Chicago 2.8%
Cincinnati 2.6%
San Francisco 2.3%
Pittsburgh 2.2%
St Louis 1.8%
Providence RI 1.5%