RSM WO I badge 1915-1918: colour?

[grumpy]

I am getting together a talk for the WFA and realised that I do not have a worsted RSM '1915-on' example, and also that I do not know if the early versions incorporated any colour.

The badge is the small Royal Arms with usual 'cat and horse, crown etc.

If it did not incorporate any colour, I would bet [soldiers being the vain creatures they are] it soon did.

So, does anyone have either/or:

sealed pattern c. 1915

contemporary description

example from a period uniform

badge without 'proper' colours, worked in cotton on worsted

colour photo

or a good quality photo of badge in wear that might provide a clue?

I am posting this on other sites to spread the search.

Please help, its a good cause!