The best way to find out if their from the 1800s is to follow the line thats on the side of the bottle, if it stops before the rim then its made around the 1800s if the line go's to the top of the bottle than its 1900s and called an IBM..made by machine... some have an aplied lip too.steve71 said:but sold most and kept a few bottles.late 1800's eairly 1900's,my guess.not all but a few of them