What's the first blacked-out character on the front of the 50? Image: http://i.imgur.com/9yZo5.jpg http://i.imgur.com/9yZo5.jpg The sequence is: ?FIDI Edit:

What's the first blacked-out character on the front of the 50? Image: http://i.imgur.com/9yZo5.jpg http://i.imgur.com/9yZo5.jpg The sequence is: ?FIDI Edit: Oh, presumably it's a "B" for Bifid (http://en.wikipedia.org/wiki/Bifid_cipher http://en.wikipedia.org/wiki/Bifid_cipher), and it reads top-down, left-to-right.