An example of the advertising poster cards what makes these unique (in addition to the pieces of large black letters that made up the language on the poster) is the fact that they actually have normal backs. Most Pre War advertising pieces that had cards were blank backed becaus it added nothing of value as an advertising piece to print the backs. In the case of Buchner Gold Coin cards it appears they took finished sheets and ran them through again to print the large type on top of the completed cards on the sheet.
This example has heavy corner wear, moderate edge wear and light soiling.