Looks like a well conserved time piece.
But Steve (oradour) is the men you need on thise one.
Always looking for Belgian Congo stuff!
John, this ia a Dunkelblau tunic which is sporting the shoulder straps for "Infanterie-Regt. Nr.126 Großherzog Friedrich von Baden (8.Württembergisches)" part of XIII Armee Korps, but this Regt wore Brandenburg cuffs with vertical Panel Piped in Blue, together with Red with Yellow 126 shoulder straps, this Regt did not wear litzen (Double or single) of any description, as your tunic has Swedish cuffs, it would appear that the shoulder straps are not original to the tunic.....you need to find appropriate shoulder straps and replace the 126 ones...I shall furnish you a list of Regiments that had double litzen, swedish cuffs and gilt buttons....the stamping looks to be "II K A" should be "BKA" then a roman numeral/s, as it stands for an Army Korps clothing store....I shall get back to you.....
Prost ! Steve.
"The German Army is the perfectly adapted, perfectly running Machine. The difference is that the Germans are organised with a view to War...with the cold, hard, practical and business-like purpose of winning victories."
G.W. Steevens - The Daily Mail (1897)