I found an awesome resource for researching my Prussian uniform!
Thanks to the generosity of the Duchess Anna Amalia Library in Weimar, Germany (Bibliothek der Kunstsammlungen Weimar in der HAAB Weimar, all three volumes of the 1851 work Die Armee Friedrich’s des Grossen in ihrer Uniformirung_by Adolph Mendel detailing the uniforms of the Prussian Army under Frederick the Great have been scanned and are available to the public!
This great resource has lots of illustrations of the uniforms for each regiment and its officers…
as well as information about weapons and accessories, including some helpful measurements.
As well as detailed descriptions of each uniform element and how it was to be worn. WOW!