The mailer is an actual postcard measuring 3.5x2.5". It has a convenient window in the front showing
"Scenic Colored Miniatures… Twenty Views…Brooklyn, N.Y." The views are twenty blank-backed cardboard cards with scenes of Brooklyn (Brooklyn Bridge, Prospect Park, more). We have Ebbets Field showing to the front. This is an early one dating to the early 1920's based on the cars. EX.