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Franz Bachmann introduced this knot in 1947, making it one of the earliest carabiner knots. The first publications appeared in 1951 in the Swiss Alpine Club magazine "Die Alpen", the Austrian Alpine Club’s "Berge und Heimat" and the German Alpine Club’s "Der Bergsteiger".
The knot slides easily, but holds securely if the main line is not too stiff and one chooses a sling material that works well with the main line.
I find this knot to be a minor nuisance to tie, so I don't use it much.
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