Helen- I think you are right. I recall discussion of it and don't think I saved anything.
--Previous Message-- : I think the brooch you are looking for is the : brooch that the present Queen now wears : every year at the Trooping of the Colour. It : is a large oval regimental brooch showing : the emblem of each of the 5 guards regiments : with a crown at the top of it. I have seen a : photo of Queen Mary wearing it on her coat : at the 1950 Trooping ceremony on the : balcony. :