Simson unit marked... e/76 dates to the late 20's probably 1927-29, typically shows up in the early f-block of Simson 98b production, 1930 introduction (Mod.98) starts late in this range, so it could be as late as 1930. I think by e-f blocks production was lagged over a few years time, Simson was never enthusiastic over this production, when the economy started to recover (due to Dawes and Young plans which contributed to the disaster of 1929 & 1931 in Europe.. Hitler would charge these "plans" as contributing factors to 1931, - it enabled the German Republic to vastly increase government spending, - think O'Biden inflationary activities which is destroying what is left of the dollars solvency...) they wanted to move to commercial production.
*** note the Jan Still photograph and description; by (long before) 1930 Simson was trying to expand into autos, baby carriages, bicycles and much more, - actually the national socialist charges around the Simson brothers was regarding it military production (which was in part due to connections with French politicians, there is some criticism with merit that they got the contract due to acceptable connections to French ties, and therefore acceptable to the IAMCC - the typical charges of internationalism (non-nationalistic views) of Jews etc... Simson made a mistake taking the contract in the first place, it cause consternation with many powerful German interests, though under national socialism it wouldn't have mattered in the long run), - the Loewe family suffered the same eventually, but like most wealthy German Jews with international connections, the Simson brothers and the Loewe family was able to buy their way out and often to America which wasn't always easy. Anti-Semitism was not a German problem, German culture was far from the worst expression of anti-Semitism in Europe, - even in tolerant France Jews often found unpleasant protests and violence. Between France, Belgium and the Netherlands they were probably the most tolerant of internationalism in continental Europe, especially the Netherlands, who long tolerated Jews (Spinoza famously, though "excommunicated" and technically not a Jew he was perhaps the greatest mind of his era which was nearly as dangerous in the 17th century as being a Jew...)