cap, button??

[Dfxcobb]

found this at a CW camp site. I had it posted in the CW forum and it was suggested to post here alao. It is lead and looks to have the numbers 242A on top. Some suggested a bale seal but still not a positive it. May not be anything but would still like to know any help would be appreciated

 

[creskol]

I'm not real sure either, but after copying it and looking at it in magnified 200% in my Elements program, I am thinking it is a late 18th century or early 19th century apothecary flask or bottle cap.