Never found a bottle with Roman Numerals MDCCCLXX, it translates into 1870.
Found diving last week. Very fancy bottle w lots of embossing. It reads
"The Great American Genuine Florida Water Prepared By Professor G.J.Byrne
New York Patented MDCCCLXX.
Very cool! That's a much nicer bottle than the standard Florida Waters. Looks like it was either a very expensive product, or pretending to be. I think the base is supposed to mimic the base to a crystal decanter, never seen that done on a bottle of that era before.
Those are some real beauties! I'd love to find one of those. The thing I was most surprised to see on that page is the one with the porcelain stopper from Amanda Miller of Germantown PA. Weirdest coincidence, I actually have one of Amanda Miller's bottles with that same stopper! It's a standard Philly blob though, so I wonder if the stopper was actually used on the bitters. I know bottles would sometimes be reused by different bottlers later in life but that's a pretty unusual one to be reused by a brewer who must have had access to plenty of other more conventional beer bottles.