Thanks for the kind words guys

The bases are basically polyfilla with some model stones/gravel stuck in on some places, this is then painted a base colour of earth brown (sometimes I lighter sandier colour) then washed with GW devlan mud wash, then dry brushed with foundry buff, finally some tufts added for effect. Hope this helps.
As former user said it means Imperial and Royal highlighting the dual nature of the monarchy - Emperor of Austria and King of Hungary (and a few other places as well

).
Thanks for the suggestion Calimaro, unfortunately they are the wrong type of feldmtuze the AH one generally had a peak (though not for cavalry) and was much more similar in shape to a british sidecap. I'm hoping to use some scarab miniatures heads, i'll post some photos to show how they turn out.
cheers
Andy