The Mauser number places it likely in 1911,which is prewar and be before Military actions were widely used.You would have to ask someone else about the Sauer number, I'm not up on them and don't know if it would be ca 1911-12.Another "tell", since you mentioned the "kick off", is Mauser factory DSTs during this period were built into the trigger guard,whereas "after market" ones were a separate assembly, pinned into the trigger guard.
Mike

Last edited by Der Ami; 02/09/15 08:28 PM.