I made a trade with a friend from my local fossil club (Delaware Valley Paleontological Society) for some fossils that he'd picked up from Rutger's University. Every year the university holds a sale of donated and superfluous specimens of minerals and fossils as a fund raiser. In this case my friend purchased specimens which had been part of the collections but were being deaccessioned for one reason or another. In this case it's a couple of rough specimens of Leptocoelia flabellites from the Lower Devonian aged (Pragian stage), Glenerie Fm. near Glenerie, NY.
Note: The white paint and india ink numbers are typical of specimens that have been part of a collection, especially if they were in a museum.