Oh wow. I can imagine. It is good to know you honour the memory and history of your forebears.
You asked about a close-up of the medals - difficult as the photo (1917) is quite small. But I've tried to enlarge it... As to the Braunschweig Verdienstkreuz - that I believe may be connected to e pre-war outing of the Duke of Braunschweig and his wife Victoria (just married) from an airfield in Braunschweig in the autumn of 1913. My granddad wrote on the back so we know who we can see here: from the left: Fahringenieur Hermann Schulze, Unbekannt (half visible), Oberleutnant Stapelfeld, Duchess Viktoria Luise zu Braunschweig Lüneburg, Ernst August von Hannover (III) Duke von Braunschweig, Kommandant Hauptmann Masius, Seitensteuermann Schwarz