Here is one of the first (maybe the very first?) advertisements for The Archer & Armsgrong series. This ad appeared in a number of Valiant books prior to the UNITY crossover and features a nice piece of art by Barry Windsor-Smith. I think this is the only time this art has ever been published. If I was to guess I would say the art was probably one of the very first pieces created of the Archer and Armstrong and was used to get all the creators to agree on a look.
Also, check out the font for the old Valiant logo lettering!
I love that tagline "Square pegs in a round world". Perfect!