I just got an email today from Dr. Klaus Vondrovec, who is the curator for Greek and Roman coins in the Kunsthistorisches Museum in Vienna. He is working in cooperation with the coin cabinet of the Staatliche Museen zu Berlin and the online catalogue will gradually be enhanced, maybe at one or two thousand coins per year.
Here is the link-
http://www.ikmk.at/index.php?lang=enor go right to ‘Römische Spätantike’ = late roman period
http://www.ikmk.at/filter_timeline.php?type_id=1-15-46
