Well ... I may not be able to say whether Chris's weight was made by Paul Ysart, but I can say that it is the first one with "Cameron" that I have seen ... apart from one that I have!
Mine, however, has a SULPHIDE of the badge, not an actual metal one. And that was one of the reasons why I bought it. I never did find out anything much about it, although I can confirm that the sulphide material is not like any others that I have seen which were by Paul Ysart. He apparently used a form of pipe clay ceramic, which has a particular look when enclosed in the glass and appears as a matte white, not like the "yellowish cast" as in my weight [although some of that colouring is down to the lighting etc. used for the photo!].
My weight fluoresces much the same (under both longwave and shortwave UV) as early Ysart weights, but that is also true of other makers from the 19th and early 20th centuries. The UV result alone cannot be used to define a maker.
The size of my weight is 91mm diameter and 62mm height (approx 3 5/8 x 2 3/8 inch). There is a rippled area to the top of the dome, resulting from the working. The base is "lumpy" and there is a protruding pontil scar giving the weight a good wobble when set down!
The size and overall features of my example led my thinking away from Paul Ysart as the maker. Also, making allowance for the magnification of the dome, the actual sulphide is roughly circular and 55mm (2 1/8 inch) diameter, which might be rather large for a cap badge. Googling finds a few refernces to The Queen's Own Cameron Highlanders, and its early names, but so far as I have searched it is only Wikipedia that shows the cap badge - which is the same as what Chris and I have in our weights.
Top viewProfile view (note the bump in the base)
Base viewCloser view of section of base Note the undulations, overall "stippled" appearance and the unfinished cracking off
I am keeping an open mind about the maker(s) of "badge weights", but I would be interested to know of any others that are sulphides rather than the actual badge.