I am researching the uniforms and badges of the King’s Colonials, King Edward’s Horse and the unrelated 2nd King Edward’s Horse in a site
www.kingscolonials.com
The smaller badge with the slider is indeed a 1970s fantasy item.
OSD collars were worn by some Officers of the 2nd KEH. These are yet to be added to an update of the site.
There is no photographic evidence to support shoulder titles being worn as collar badges.
Cheers Dean.