I have done some more snooping around, and found out a little more about this peace-bond.
The peace knot was definitely
NOT easy to untie & tie again. That is the whole point! As far as I have found out it was tied in leather thongs or string that was strong enough to hold the sword in its sheath, but weak enough to snap if the sword was pulled with force. (As done when
really needed) In some cases there appears to have been used a wax seal on the bands. The whole point is, naturally, to reveal if the sword had been drawn, in which case the person had to explain the reasons for doing so to the local authorities.
My guess (
personal guess, mind you!) is that it was not one single knot used universally. More likely each place/region had its own version, for identification purposes. It was also most likely rather complex, to prevent that others than the proper authority persons learned how to tie it or to see if it was correctly tied. I think it also very probable that thongs/strings with particular colours or other distinguishing features might have been used, etc.
I base my guess not on knotting knowledge, but on the purpose of the knot. I tried to think as a local 14:th century guard captain, or something - and this is what
I would want to put on the swords carried in my town: Clearly identifiable and distinctive, difficult to manipulate or duplicate, and clearly revealing if the sword had been drawn.
Conclusion: Just about any knot arrangement that fills the requirements above is likely to be as correct as anything you will ever find!
If you are into re-enactment and use thin leather thongs or strings - in the colours of the local nobleman, if you like - tied around the hilt, stretched to the sheath and tied again in a suitably complex knot I dare to say you will be on fairly safe ground historically! (At least there appears to be little or no historical evidence to prove you wrong!
)
Lasse C