Thanks David, Rhysmichael interesting points.
I just found this online passage which may be of intrest?
The first satanic cult which possibly existed was operated by Catherine La Voisin at the Court of the French monarch Louis XIV. Although some historians are skeptical, the documents of the inquiry by Nicholas de la Reynie, the Police Chief of the king -- who was not a particularly religious man but a rather cold and stubborn policeman -- published by the 19th century historian François Ravaisson-Mollien, make a persuasive case for the celebration of "Black Masses" (the term was coined by La Voisin herself) at the Court of Louis XIV. "Black Masses" were described as rituals mocking the Roman Catholic Mass, in which Catholic hosts were desecrated through sex rituals and children were occasionally sacrificed to the Devil in order to obtain power and love for the wealthy customers of La Voisin [2]. La Reynie's police effectively destroyed the cult, but the emerging press made the incident infamous for decades in Europe and copycat imitations surfaced during the 18th century and during the French Revolution. These episodes were connected by pious Catholic authors to the Revolution itself, which they believed had been masterminded by anti-Catholic Satanists.
The "gargoyle heads" as called under a lens are clearly not Gargoyles , but human faces one dejected & unhappy the other covered in boils, both wear Jewish or I would say more likely bishops skull caps.
I understand French & German satanist knives are well recorded from at least in the 3rd quarter of the 19th century. But certanly many are later.
Intresting images David, scenes of goat sacrifice with dagger & pan from "the devil rides out" seem more in keeping with such a clearly potentialy lethal design of blade.
Spiral