That little shop under the arches isn't M&B Radio is it?

Yes it is, I'll come back to you if I need directions.

NB The Citroen DS is only half the tale, it has to be the, very rare, decapotable(Convertible). Even then, one has to beware of imitations, some of which are either dangerous, or impossible to maintain. It must have provenance that shows it to have been built by the coachbuilder Charpontier.