Without embossing of some sort it is difficult to put an exact age on it. One way to judge its general age is by what was found around it. The best way is to look for a seam on each side. If there is a seam that runs up to somewhere near the base of the neck, then disappears, then it was made before 1922, which is when the full bottle mold was brought into use, which would have a seam the full length of the bottle. Ofcourse there are some of the older bottles, especially wine bottles that used a spin action when removed from the mold which erased the lower seam. But without a closer look, I would have to go along with the others, late 1800's, early 1900's. It has a very nice color, and a flared mouth which is fairly unique.