Hi robomule and welcome to the forum

Oddly enough, I posted this url to another member of the SCF and it was also for the study of the Penny Reds.
If you are really serious about these stamps, you might want to try this url:
http://groups.yahoo.com/group/mulready/There are well informed members in there and they do have a comprehensive database on the Penny Reds. (Maybe you are already a member?)
Chimo
Bujutsu