Thirty aught six: I assumed it was aught. As in, "remeber what happened back in aught five" Its an old fashioned word for zero. 1906 would be 19 aught six, shortend to aught six. aught 2 also ought Pronunciation (ôt) n. 1. A cipher; zero. 2. Archaic Nothing. edited to add: I see this has allready been adressed,nevermind.