If you guys are assuming that a round is roughly three months than almost any unit could be built in real time in that period of time. I have a book on Panzer Tanks and even the most powerful tank could field a full battalion in a little over three months. And when talking battleships, if it was a German pocket Battleship I believe it could be made in three months. You have to remember that most industries in these countries were geared almost completely to the war effort. :D :D