My gut feel is that Pete's correct though....
Having said that, I think that 15 or so years ago there were quite a lot of 1858 Bramah 26a's Missing Serifs around, but I'm sure one doesn''t see so many nowadays....probably because Bramah has been discussed on forums such as this since then and people became more away of the variety and collected them....now tucked away in collections.
I have a spare of the Bramah book if anyone is interested, quite a nice copy...….but they don't come cheap, quite collectable in themselves!
PM me if interested.