I recently purchased a black glass onion bottle that I believe is from the early 1700s. The shop I purchased it from said it was from the wreck of an English ship that sank off of the Vero Beach, FL coast around 1545. Were black glass onion bottles even made in the 1500s? In the 1600s? I didn't pay much for the bottle so I'm happy with the price and condition. Just trying to nail down an approximate timeframe.