Picture collector (glass plate negatives, negatives and original prints) and cards related to aspects of flying mainly before 1918. All my pictures published on Flickr are from my personal collection and when asked for are available for publication in books or magazine articles. I do not intend to send scans who are not used for publication. The originals are not for sale. The only thing asked is that used pictures are marked as from the "Kees Kort Collection". No further obligation but it is always appreciated when you sent a copy of a book or magazine article to my address. Original scan sizes can be provided without the mention "Kees Kort Collection" in this case, but beware these scans are much bigger than what is published on Flickr, as it seems during the upload they are compressed by Flickr.