This particular dagger is made by Hanwei Forge, run by Paul Chen in China. The official catalog name of this piece is the "Trident Main Gauche", though the term main gauche, to my knowledge, is not a historical term (being French for "left hand", despite the fact that daggers of this type were used all over Europe and not just in France). The "trident" portion of the title refers to the fact that with a push of a switch the blade has two spring-loaded arms that quickly open to form a trident shape that can aid in parrying a sword.
A large number of such weapons survive today and are in displays at museums all over the world. I have never seen a picture in a fencing manuscript depicting these daggers, and I suspect that their use was more of a gimmick than anything truly practical. That does not change the fact that they are wonderful displays of the kind of creative craftsmanship that was applied to weapons during this time period. I do not believe that this particular dagger from CAS Iberia / Hanwei is supposed to be based on a specific example, but rather represents the general style.