As a retired Manhattan real estate broker and building owner, collecting images of New York buildings was almost second nature. I am attracted to the factories and headquarters portrayed on letterheads and billheads. I favor buildings that I can identify—especially if I had brokered the sale or leased premises there. Building images are readily available. I have viewed two collections at Columbia University’s Avery Library; both offer a large selection of Manhattan buildings. I wish to augment my collection of over three hundred images by including images of products that appear on old stationery of Manhattan companies, but have had difficultly finding sources. Products, as opposed to buildings, are not easy to find. I am willing to accept good copies, as well as originals. All leads are welcome.  stephenfreidus@gmail.com