Three German philatelic items hopefully of interest. The Stadtbilder cover is serial numbered, No. 215 issued in 1963. The 1972 Europa Marken is a cull with a tear to it, there apparently was a card inside someone was in a rush to get to. I don't know the year of the Wolfahrtsmarke but they look to me older than others found available; they are mint gummed except the top right red one which was hinged.