Hi Ian, the RND badge will make me nervous about that style plaque wherever I see it now. Although collectors have a problem if the original die for striking the plaque is with the restrikers. Interesting that we have two opinions on the date of the CMGC badge 1934 and 1970's.
Anyway here for posterity is the NH Collar with a plaque I've had for 30 years. (no. 6)