Great bike Henk. I think you did very well with getting your hands on it. Thanks for photo coverage. It looks very nice indeed. The digits under the shell look hand stamped and that is unlike with regular production frames.
Some parts are non original for a FullPro in genaral or the Capri Sonne bike more specific. You already mentioned the 600 bits, but there is also a later era DA headset, earlier cranks and I think I see non DA QRs, but I am not sure. A Rolls is later and dito for the tape. Possibly it was sold as frame only at some point and equipped with more or less correct parts.