Information on collecting vintage patriotic postcards. Menu. The German cards were of exceptional quality and are some of the best - Easter Postcards. You searched for: german easter cards! Vintage Post Card German Easter postcard Frohliche Ostern! Happy Easter! Ephemera stamped postcard. Shop for-and learn about-Vintage Easter Postcards. The earliest known depiction of the Easter bunny in the United States was acquired by the Winterthur.