In 1990, Helene Huvelin published an article, "Les deux emissions londoniennes" in Numismatische Zeitschrift. In this article she listed 157 coins with the star in right field mintmark and 47 of the star in left field mintmark. This was a significant increase over those already listed in RIC. However, in the last twenty years numerous other types have come to light (such as the coin shown above) and a revision of this work is long overdue. I am now compiling a new list of these issues and would welcome any information pertaining to coin types of these mintmarks not listed in RIC or Huvelin.
Note: The coin shown at the top of this post is a nummus of Constantine the Great, obverse - CONSTANTINVS PF AVG helmeted and cuirassed bust of emperor right, reverse - MARTI CONSERVATORI Mars standing right with spear and shield. The helmeted bust is more usually shown with spear and shield.