How does the safety operate? It looks a bit unusual and I am wondering if it pivots, which seems unlikely, but then that gun is very unusual in so many ways.
You are correct, the safety pivots. While it may seem unusual today, it was quit common of the early hammerless sidelocks. I have owned several by T. Woodward and I owned a Lange trigger plate patent that had a pivoting safety too. The Lang I owned may actually have been the same patent as the one above. You will see some early Scottish round actions that used the pivoting safety as well. The early hammerless snap action guns have always intrigued me.