I recently acquired this from a large collection that was just full of interesting items.
Doing some research someone pointed me this way to this forum using a reverse image search finding the thread shown below.
If anyone knows anything else about this piece please let me know. I plan to list it for sale and would prefer to have as much information as possible.
https://www.practicalmachinist.com/...-history/bench-watchmakers-micrometer-221826/
