Board Thread:Policies/@comment-246292-20140502145126/@comment-4324417-20140628114539

Are you referring to the events that lead up to Crisis on Event Earths? The reality of Jay's that Barry was able to visit was Earth-Two and that's because they were both vibrating on the same frequencies.

Max Mercury also hailed from Earth-Two first appearing in Nation Comics Vol 1 5. So no, Jay does not get his own earth designation. He was in a shared universe with Max Mercury before Crisis on Infinite Earths.