Ok all. I stumbled onto this forum kinda by mistake. So heres mine Mine is a very early model, steel barrel, 50 yard sites Nowhere on it is it marked "No. 201-Z" Serial # is 12##, exact number not given, but you know the range. Serial number is actually on the trigger housing looking down when the breech is open. Not visable unless you are really looking for it. No unusual characteristics, no documentation. I actually still use mine, I get smoke ends and what not and fire them. 37mm rnds work perfect. It is not a dd.
