I will add that contemporary images of this badge would appear to be very rare, which is not surprising really.
An earlier thread by Longshanks did show the badge in use
http://www.britishbadgeforum.com/for...ad.php?t=27087 but it would seem that the "RND" title is applied to the front of the badge instead of joined to the bottom as all the badges in this thread show.
It would be interesting to see if anyone can come up with some more images of this badge being worn so that types of construction can be compared.