Ducal coat of arms of Parma, Piacenza and Guastalla, House of Bourbon (1748-1802)
[1]
Coat of Arms  [A mitake Chain of the Order of Saint Januarius identified as Order of Charles III. Chain with "C", bishop mitres and towers belongs to Saint Januarius][2] and *Imagehttp://encuadernacion.realbiblioteca.es/node/12873

Use of St Januarius Order, Charles III Order non common House of Bourbon-Parma Orders  [Uncommon variant with 4 orders] and shells on bordure [3]
Heralder, Elements by Sodacan &amp; Adelbrecht