Dan (and Ed): It is documentry proof that I am looking for, as opposed to modern books.
I went through a lot of the google images of Canadian Artillery during WWll, and found primarily the Apla-Numeric style, such as B1. But I have not been able to see enough photos of guns or tractors to form a solid opinion.
I did not see any photos of the single letter type, where the battery would be indicated by the small red square, and the guns identifier would indicate which troop (1 troop =A,B,C,&D, 2 troop=E,F,G,andH). This format is shown on Micheal Dorosh's canadiansoldiers.com site:
http://www.canadiansoldiers.com/vehi...ticalsigns.htm
Hoping for more input from those in the know.