Ostbote, a German hybrid potato from 1933

Ostbote, or "Eastern Messenger" is an older European potato, bred out of crosses between the German W race potatoes, which were crosses with the Mexican hybrid species Solanum x edinense, which introduced late blight resistance.  It was a superior producer in Europe for many years, with multiple disease resistances.  Although it is no longer a match for current strains, it still has impressive resistance to many of the most common viruses.  You can see its pedigree and connection to many older Eurpean potatoes here: https://www.plantbreeding.wur.nl/PotatoPedigree/pedigree_imagemap.php?id=6025