Hi,
I am looking for these silver-rimmed red-lensed sunglasses of Christian's.
Here are some photos from two episodes of First Season and Second Season's Agatha Ripp episode in which the sunglasses have appeared.

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I've heared they could've been Prada, but it's only a rumour.
I also looked in catalogues, forums etc. - nothing.
If anybody knows the designer or model of these, please et me know.