This is not the most useful reply, but this link might lead you on to others and if you collect bottles the whole site might be of interest to bookmak anyway, always assuming you haven't already got it.
http://www.glassbottlemarks.com/numbers-on-base-of-bottles-containers/I am trying to find out what date Winchesters went from having either corks, glass stoppers or crown bottle tops, to being screw thread tops, because the Winchesters we had in the dispensary, including amber, clear and blue glass, were all screw thread tops and that goes back to the mid 1960's, so I anticipate your bottles will be older than that, as you say they were discovered around then. I did wonder if the '140' was a date, Jan 1940?
Anyway hopefully, it all gives us something to carry on the search with...
