An 18th century hair-trigger
This is the hair-trigger (D: Nadelstecher) which is held by the lug-head screw in the previous posts. The front end is clamped beneath the trigger guard, and the lug-head screw clamps the back end (where the modern clamp is shown).
It is unusual in having an extra intermediate lever, which makes it extraordinarily sensitive, in spite of the strong sear spring. And all edges are sharp. After all, it's only about 250 years old!
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