As far as I can tell these are the Coburn Bros. from Portsmouth, Ohio. I found a few references to them but unfortunately they’re all OCR text; for example, from the Portsmouth Daily Times dated Oct. 30, 1922: The Purina Mills guarantees that you will gel mom fgB or your tnonny btck, when you feed Purina Cbowa u directed. Phone us. SCHICKEN CHOWDER COBURN BROS. Portsmouth, Ohio Phone 745. Scanned from the original 4.25 x 2.75 inch snapshot. | Click image for Comments. | Home | Browse All Photos