This card was chosen because it shows a German player and was also issued in Germany. Johannes Kepler, on a modern map, was also born in Germany, in a place called Weil der Stadt, which is about nineteen miles west of Stuttgart. However, when Johannes Kepler was born, it was actually the Free City of Weil der Stadt, and was part of the Holy Roman Empire. Less than twenty years after his death it was entirely destroyed, during the Thirty Years War, though it was subsequently rebuilt. And, rather aptly, it also has a second name - of Keplertown.
Our man of the moment is Ludwig Wieder, and there is little about him online, though we do know that he was born in March 1900, in Nuremberg, and that he lived until December 1977. Even Wikipedia only has him down as "a German International Footballer", though they do have dates, showing that he joined F.C. Nurnberg in 1922, and was on the German International squad a year later, eventually playing in six games and scoring two goals. He stayed with Nurnberg, which was his home town team, until 1931, then it appears that his non-football job, he was an engineer, took him Duisburg, some three hundred miles from home. He did continue to play football, with a new local team, Postsportverein Duisburg, and he also became the club trainer. This led him to being headhunted as a coach by Alemania Aachen, where he was from 1937 until the outbreak of the Second World War. Once that was over he found himself in East Germany, where he became a sports coach and trainer, seemingly with schools, or youngsters anyway.
These cards may come from Germany, but Gartmann was originally a Swiss company, dating from the late eighteenth century. Remarkably it is still in family ownership.
Their football sets started in 1924, with Series 571, "Augenblicksbilder vom Fussball" (or "Moments in Football"), a title which would be repeated for nine other sets. In between those were other, non related sets, and also more football sets, regional ones. Some collectors believe that the general "moments" sets were issued across Germany, whilst the regional ones were only issued in that particular area - something which is backed up by the dating, 1924 having three general sets and a set each from North and South Germany, 1925 having five general sets and one each from Berlin and Central Germany, 1926 having a general set and a second North German one, plus one entirely devoted to a single game, Hamburger SV versus Cambridge University, which Hamburger SV seems to have won 6-1.