Beautiful car, Rolf. 8ma534 is definitely an early car, one of the first ~dozen known to still survive. Would love to see more pictures.
Btw, the red looks great. But in case there is no luck tracking back thru the first 3 owners on paint color, the next way is to look under door panels for glimpses of original overspray. But at least, the 'as born' color is really not that important here- (Provamo has an 'ad' that lists my car as once Yellow, and though I love yellow i went back with red only because it was always the red (I've been over every millimeter of the car naked, it was never yellow...darn!).
If someone starts hinting that they have a build sheet that shows incredible detail about special components on the car--be careful to get a guarantee on the information first before paying for the 'proof...' I'd heard a story once from someone I trust...Lee