A nice other ranks cap badge Alan.
Personally I attribute that die to WW1 as I have seen an example on an extruded slider and the distinctive arches are visible in several WW1 photos, inc. above.
My understanding is the officers metal cap badge was a different design with a scroll akin to the recent GWF photo.
Here is a die cast bronze example on the forum.
Blades are encountered on a few other early Yeo other ranks badges.
You can see the WM version in my Top 10 Wanted album, the fixings are the same as the bronzed badge in post #37. My view is the tang fixing badges are early pre-War manufacturer.
At the outbreak of WW1 the R1DY were wearing bronzed badges on khaki sd. The 1916 tenders record that order as bronzed GM also.