Good catches from a type afficionado. There is also the discretionary ligature for Number (”No.”) located at the top left of the page on the Kenyan BC. Completely different from the one on Bomford. That ligature is a feature you get with set type, or possibly with a modern Open Type font if you know where to find it and turn on the alternates. It looks like the font for the numbers “495” is Century, but I can’t find a ligature or alternate that matches the “No.” on the Kenyan BC in the OTF catalog. (That doesn’t mean that there’s not one, I just haven’t located it.)
Oh fudge... I meant to say the ligature was on the Bomford BC, not the Kenyan. Sheesh. Just reverse everything I said.