<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Steffeck" class="extiw" title="w:en:Carl Steffeck"><span title="German painter (1818-1890)">Carl Steffeck</span></a>
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<a rel="nofollow" class="external text" href="https://lot-tissimo.com/de/i/10859614">Auctionata, Berlin, 19.05.2016, lot 81 via Lot-tissimo</a>