Had permission to detect around two old houses that were in disrepair and being renovated and the most exciting finds were a '47 wheatie and some 1980's kid's buried treasure of 15 pennies in one hole. But there were two cool old bottles sitting on a tree stump I asked the guy working on the houses about; he said to take them if I wanted them. Would love an approximate date if somebody knows. Brown is 7.25", clear 6". Soaking them now. Brown marked NB and Co.; clear has an M in a circle