It is Stadden Model HP136 Soldat Premier Regiment de Cuirassier-1815 and Voltiguer 45 de Ligne-1815. The horse and mounted
Cuirassier is broken off. So all you have let is the Voltiguer. Both were also sold separately. It is in all the Stadden catalogs from the earliest.
It's 90mm.
Check the first three pictures on a Google search. For some reason the Treefrog archive doesn't work.
https://www.google.com/search?q=stadden+Cuirassier&rls=com.microsoft:en-US&tbm=isch&tbo=u&source=univ&sa=X&ei=eUu4VK_rDcexyATL8oGABw&ved=0CB8QsAQ&biw=1280&bih=641#imgdii=_
Amazing! Knew there had to be more to it. If only I had the horse & rider! Thanks for the help!!
Further to your request there is a complete model of this impressive viginette currently available on ebayUK with photographs.