Ron, I’m not sure this is similar, but here is a set trigger mechanism that was added to a Christian Oerter rifle dated 1775 that was found recently in Germany. This set trigger assembly is simpler and perhaps stronger, with a stout pin rather than wire or needle for front trigger, and a smoky blue color from hardening and tempering remains visible.
Caspar Wister was importing rifles from Germany to Philadelphia in the 1730’s and 1740’s. Several of his letters state “the barrels should be longer than normal because the people (here) prefer rifles with barrels that are three feet and three to four inches long . . . with a strong (large) bore, and with set triggers that can be fired set or not . . . But please no more with small hair /needle triggers . . .”
These fine triggers are common on fine European rifles, but not common on rifles made here in the colonies. This Oerter rifle was originally stocked with a simple, single trigger, but the double triggers were added at some later date – perhaps after it was taken back to Germany.
I did not mean to hijack your thread, as you are discussing European triggers of very high quality, but this may also be a European trigger installed into a “plain rifle”. Bob
(https://i.ibb.co/s10gnFp/triggers-below-email.jpg) (https://ibb.co/Zgnf5hR)
(https://i.ibb.co/ynKBtrp/triggers-unset-left-side-em.jpg) (https://ibb.co/svcJnZC)
(https://i.ibb.co/GxZ7Fzd/triggers-set-left-side-mail.jpg) (https://ibb.co/Pm2xtqr)
(https://i.ibb.co/0JT57hn/triggers-unset-lock-side-em.jpg) (https://ibb.co/ggNY2zr)