PhysDoc, reading your response prompted me to search for more information on Lyman 22 and 36 sights. In my search I found your post from several years ago where you describe making parts for the Lyman 22 sight. I learned a lot from that post so I’m sharing the link here in case others are interested.

https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=563735&page=1