Lovely postcards. Not too much when they grew up...
I'm in contact with one of Elisabeth's granddaughters. She once sent me some photos of Elisabeth as an adult. In my opinion she wasn't a beauty, but a good-looking woman. Even as an old lady, she had a smart appearance and seemed to be happy.
I guess I have never seen pictures of Clemens Joseph as an adult except for the one Rani posted. This photo was published in a book about the Wittelsbach-crypts by Hans Rall. As far as I know he worked as an art historian and was quite close to Jean-Louis Schlimm as the author once mentioned in an interview about Sophie Charlotte d'Alencon.