I have two recurring provenances in my collection, and I was wondering if anybody knows something about these collectors. One is a certain Nadja Kapamadij (sometimes referenced as NK collection) and the other one is Marc Poncin. Mr Poncin may also have been a coin dealer, but I am not sure. Does anybody know more about these collectors? When their collections were formed, if they are published, etc.?
I found some references to Nadja Kapamadij. Parts of her collection were apparently bought by the British Museum. https://www.britishmuseum.org/collection/term/BIOG72847 Others parts were sold to private collectors:
