Dating antique coke bottles
The photo shows the various shades of amber that occur naturally, with the repro in the middle: a Macon GA S-S.
There are no natural amber S-S bottles from Macon GA.
However, these purple bottles do make a nice color addition to your collection.
There are some naturally occuring bottles with a light amethyst/purple tint - leaving them out in prolonged sunlight will darken the tint (but they will never become a dark purple).
The Hutchinson bottles derived their names from the metal stopper device used to seal them. To open the bottle, the consumer punched down on a metal loop in the stopper, which broke the seal and made a popping sound. After the turn of the century, the Hutchinson stoppers were gradually phased out and replaced by bottle caps or crowns.
According to the Petretti book on Coke bottles, the repro labels have even/straight/uniform lines while the originals had uneven/dotted lines.
By 1917 Cokes started being produced in the familiar hobble-skirt shape which is still used today.
You can find an enormous variation in the sizes, colors and markings of bottles.
The straight-sided bottles can vary in value from up to around 0, depending on the condition and the uniqueness.