With permission I have this terrific outline of what Scouts have worn on their shoulder as council insignia originally posted on the Internet by Gene Berman.
The best primer around is the “Aid to Collecting…” CSP guide which now also has a complete section by Blake Keasey and others on Red and Whites. By going to the ISCA website, http://scouttrader.org you can get information on how to purchase said guide.
Read more on Boy Scout Eras of Council Shoulder Insignia by Gene Berman…