About 30 years ago, I discovered an old dump site used by my relatives behind a cherry orchard above a house which is now about 140 years old. I found my first old bottles there. Even a safety razor that has gears on top that when you twist the lower part of the handle, these gears on the top of the razor open it to insert a new blade. Unfortunaltely, I left it there and now the dump site is a new neighborhood. anyway, I found about 3, 5" high cobalt blue "Milk of Magnesia" bottles there with cork tops. Anyone know when these were made? The seam stops below the neck.