Finally, and by sheer fluke, I found what I wanted. I was happily trawling through ELF's site, as I do now and then, and I came across these:
Having escaped the constraints of the Georgian period I can now have what I like and I like these chrome finish ones. The handles are for the basement and loft rooms and the knobs are for the posher public areas on the ground and first floors. I haven't used the knobs yet but know I will like them and they make much more sense than brass.
|three down, seven more to go|
Incidentally door knobs or handles are usually thirty-nine inches from the floor. They do vary with the period though, so it need's checking if you want to get it 'just so'.