CTL marked British type road wheel seals?

[Lynn Eades]

Pictures would help Alistair.
There is the early seal assembly and the later improved type seal. The early one sits fairly flat at the bearing bore area, while the later one sits proud and has more than one seal. The early one has a ring type seal track while the later one is integral with a large dia. flange which has another seal running against the inner face (no pictures!, sorry)
Aside from the bronze wheel bearings, I have found two types;
One is early use and consists of of 2 semi thrust ball bearings (which must be fitted in pairs and the right way around)These can fall apart The center spacer dictates the preload (and I think there was extra spacers at the bearing O.D.
The other being the std. 6000 series ball race. 6408?, 6410? (can't remember the numbers)
Does that help at all?