I used to collect and sell that stuff when I was a kid.
you get the old court records to find out where the old farm dumps were and you dig there.
One of my friends turned up a whiskey bottle from like 1798
Wow! That is impressive!
The oldest I ever found, was a three year old ‘box’ of Cabernet in my garage last month. (Hidden under the Christmas decorations.)
We used to dig out old filled in Cisterns for bottles. A very dangerous hobby LOL. You have just a few hours before the walls become too dangerous to dig anymore. You could easily tell what decade you were in and when you hit Prohibition. Prohibition showed much more than usual medicine bottles :>}
I still have a bunch of old Christmas Cokes and even a couple of six packs of embossed 10 oz Coke bottles. Most memorable find as a blue Mason quart jar Nov 15 1858 laying on the side of a dirt road. BTW ever see any Number 13 jars? I think I've seen one.
I live in a house built in 1804. I know there’s an old privy hole somewhere in our yard - probably under the apple tree. Might be some nice old bottles and other stuff down in there somewhere!
I found a projectile point from ~9,000 BC (Folsom). :P I was working as an archaeologist at the time, but it was just sitting on the ground.