Discovered an amazing new place! Began probing around in the clay and I hear *tink!* dig around and low and behold - a circle slug plate embossed whiskey flask!
The flask reads: "Honest Measure Simon Strauss Inc 221-223 W 116th ST 467 Columbus Ave N.Y. One Half Pint"
Also found a...
Found this today. It is a hand-tooled flask with a circle slug plate embossing that reads: Edward Rafter Importer New York City.
Can't find any information about Mr. Rafter or his imports buisness, perhaps it was just a short lived enterprise.
In situ: