Oysters were sold on the streets 'on the half shell' and served with vinegar, salt, pepper, and/or cracknels. The following images are from Cries of London, New York and Philadelphia from the late 1500s and 1688 through the 18th and 19th centuries. Click to enlarge.
"American Foodways: The Jewish Contribution" was an exhibit at the Longone Culinary Archive, University of Michigan Library.This fine online exhibit contains images and
information about each book and author; menus, markets, and food festivals. It may be viewed HERE and HERE