Hello FPN, I'm back after a long hiatus. Yesterday I made a trip to the cross company store where they had some NOS Century II's. I quickly looked and saw that one had a "B" on the nib. But upon getting it home and inspecting it closely, it was actually a "BB". I had never seen a Cross BB nib before. Anyway, check out the photos. The bottom nib in both photos is the BB and the top is my Cross Signature "B" nib for comparison.