German "Altbrief", taken from a philatelic Collection. There is no stamp, because this letter is written in 1834, the time before stamps were used.
<a href="//commons.wikimedia.org/w/index.php?title=User:Christian_forster&amp;action=edit&amp;redlink=1" class="new" title="User:Christian forster (page does not exist)">user:Christian forster</a>
1834
photograph of 1834 letter from philatelic collection