Peter
The S/G "Flint, & Dendigh Yeo" collars are shown, by illustration, in T J Edwards book and according to his notes he says they were worn from 1962 up until becoming 3rd (V) RWF
I can imagine the collars are pretty rare now
I have images of the ORs A/A version in my album though.......
BTW the difference between Collar & Cap badge is the word "AND" is replaced by "&" .... so the cap badge says "FLINT, AND DENBIGH YEO." and the collar says "FLINT, & DENBIGH YEO."