Hi Paul
As far as I am concerned the all green knot with the round ball shape is the only one that is correct for these daggers. The frogs(koppelschuh) are very difficult to find, they are quite distinctive in that they are very narrow and have a single rivet to the rear. I have a number which I have found over the years and I know that Wotan shows at least one original example in a previous thread.
Gary
