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'Swordbreaker' parrying dagger for catching and binding enemy swords, Italy, ~1600 AD
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Just a magazine for everyone to share artifacts and replicas for the historically-inclined to admire!
I also saw it as a way to lock their sword for a few seconds. Uncertain how it works in the real world/historically, but in my head, I see it as locking, pulling them in then a quick knife to the throat.
You would use it with a main sword or cudgel/mace not a second dagger since the sword breaker is a type of parrying dagger.