Sometimes I get ahead of myself: I picked up the "standard" brick and thought that it could be my lead photo for the project. (There are a few steps between here and there that I haven't quite done yet. Like decide on the format, lighting, and actually take some pictures.)
I don't know the significance of the F Price brick versus the much more common J Price marking; it's a phrase that has proven remarkably resistant to Google. In fact, there's a surprising lack of information about old bricks and their markings, so it's a bit of a history project ahead of me, not just a photographic one.