The only pictures I know of are in a catalogue of Swiss ecclesiastical textiles, written in German, which I got via interlibrary loan. (Rutt's History of Hand Knitting charts the patterns but doesn't have an actual photograph.) I did scan one of the Swiss photos for private consumption, since I had to return the book. Would sending it to you privately as an educational use satisfy your lawful goodness? If so, you can e-mail me at ursula at farreaches dot org.