Other conformations ranging from 2 to at least 6 rings have also been noted as well as some with vertical staves.
Photos courtesy of Greg Spurgeon Antiques.
From these features it is reasonable to conclude that the bottle dates somewhere between the late 1880s to early 1910s.
Some other types - like milk bottles - naturally fall out into their own category.
Thank you for your post, and I do appreciate your great information! It is also apparent that no other vertical seams are visible within the finish either -a typical attribute of most machine-made bottles - although there is a fine horizontal mold seam usually visible around the outside edge of the finish.
That appears likely to be the first year rim codes were used with a quick realization that a year code would also have to be included for longer term use.
Description: In the same way, a mold number 0-15 underneath the jar is meaningless.