Stan Barr wrote: > I'm using a NATO key type No. 5805-99-580-8558. This is basically > a military version of the Swedish Pettersson key, still available as > the DK100. The Petterson key and those like it are derived from the �ller design of the 1857. The design has endured for 160+ years. I have prepared an article this particular kind of key at http://www.metronet.com/~nmcewen/Lindholm-and-Wikstrom-key-george.html