ijnfleetadmiral wrote:Hitler DID have a personal rank in the SS: Oberste Führer der Schutzstaffel. Literally, "Supreme Leader of the SS", was a special title intended to be held solely by Adolf Hitler. When the SS became an independent organization from the SA, Hitler was listed on SS officer rolls as SS member #1 and the group's Supreme Commander. This title was intended to give Hitler a technically higher SS rank to Himmler (Reich Leader of the SS), but there is no photographic record of Hitler wearing an SS uniform, and there was no special SS insignia for Hitler above that worn by Himmler.
I could see someone in one of the SS department designing one, not because Hitler would use it but either for propaganda reason ('The Führer, honoured member of the SS') or simply because of a need to make it official in this way (i.e. having it in a chart).
As to what it might look like, I could see the insignia of Himmler but with a double wreath or a wreath surrounding the "SS" runes.