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CS Grant states in his "Armies and Uniforms of Marlborough's Wars" Vol. 1 for the Hanoverian army that "by 1700 the skirts of the coat were turned back producing the turnbacks which were later to be military fashion throughout Europe" (p.71). This refers to the horse/dragoons as I read it but perhaps also to the infantry. There's also a picture of a von Bülow dragoon in Z. Grbasic/V. Vuksic "The history of cavalry" (p-46) showing a trooper with turnbacks. Thus making the Zvezda horse usable for Hanoverians for WSS. Hope that helps.