Hi
Thanks for posting
This is a fairly common bottle - it is found both with an open pontil mark and also like yours with a smooth base.
Yours dates to the later 19th century.
This bottle is well known since it was a popular brand which contained a fair amount of opium.
Unfortunately since it is common and condition is really a key element to value in bottles, the base flake really does hurt its worth. Even perfect it is $5-10 on a good day, it does have some residual value nonetheless.