Did some brief research, seems to be civil war or just after. There are several versions if this, no makers marks.
It was encased in lime dust so is not in great shape. There was a huge lime pit nearby, could have even fallen off a coat when unloading kilns! I know many military folks wore...
This button came up burried under the original hearth, back then surplus lime from mortar and plaster was sometimes used as a base for dry laid brick or stone.
I have been in and around old homes for many years. Worked in the architectural salvage field and now working in preservation and historic site maintenance. Always poking around for junk, extra proud of these bottles as they came from our own back yard.
Also, the stoneware bottle is labeled...