Russell says his research indicates that Hospital Department bottles were mainly manufactured at factories in Pittsburgh, and Baltimore, the principal manufacturer was at Pittsburgh with the secondary manufacturer at the Baltimore Glass Works. Bottle authority Mike Russell, has written widely on Civil War bottles (see references below).The closer a bottle is to original condition the more value it will have.Items that can increase the value of a bottle are: There are other things to take into consideration when evaluating old bottles.
According to antiquemilkbottles.com, the shape indicates when your bottle was manufactured.
There are several factors that determine the value of old bottles.
While an accurate evaluation can only be done by someone experienced with antique bottles, you can get an idea of how much a bottle is worth by considering these factors.
Bitters might be flavored by juniper, cinnamon, caraway, chamomile, or cloves.
In 1824, German-born physician Johann Gottlieb Benjamin Siegert, serving as the Surgeon General for Simón Bolívar in the fight for Venezuelan independence from Spain, formulated Angostura bitters—derived from the herb gentian and not angostura bark—as a remedy for seasickness and other forms of nausea.