Not a named Simson, but I still highly suspect it is made by them, for the retailer named on it. The receiver appears to be Simson made, possibly a leftover from the war, the circle/2 marking appears on their wartime production starting about 1917 as far as I can tell. By the mid 20’s proof dates start becoming common, so I suspect it was produced roughly in the 1919-1924 range.