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The second is a fantasy/fake. If I remember correctly it was probably intended to be an album spacefiller for a #5.
What people use as spacefiller's for #5 is anybody's guess, but the item in reference is not a fantasy or a fake. It is a postal stationery essay cut square. The link Don gave to the Langs offering gives the United Postal Stationery Society (UPSS) catalog listing to another variety of this same essay type. It is a well recognized variety with SPECIMEN overprint.