Posters of original research, analyses, insights etc retain all rights to their work.
Such research etc cannot be used in any format without the written consent of the author.
Re: Princess Margaret. Horse brooch. Purpose of the portrait
The portrait below was commissioned for the Royal Third Fusiliers, Princess Margaret being their Colonel-in-Chief. In 1956 the painting was displayed at the regiment's headquarters in Germany while it was stationed there.
I haven't yet narrowed down precisely what the regiment badge looked like at the time.