19th century Postal Stationery concordant cards are correct Maximum Cards.
We have also opened a discussion on the postal stationery in circulation during the last 30 years of the 19th century. This is certain postal stationery, on which the image of the stamp stuck on the view side of the postcard has a visible concordance with the very small picture printed on the postcard. We all agreed that these postcards, in conformity with the regulations, both previous and new, are considered precursors of Maximaphily and in consequence they are valid maximum cards.