Signing your work has a long history and not just pn what we now consider "craft work". When I was in high school and working for an older local carpenter, he had us rebuild a small front porch for an elderly widow. Even though it was done free, he insisted that we put the same care into our work that would be expected on the most expensive job. Before he nailed the cap on the railing end post, he had us all sign the top of the post, wherelikely no one would ever see it. I don't recall him saying it, but his message was clear - if you did your best, you should be proud enough of it to take responsibility/claim it.
Decades later, during demo on a fire damage "century house", we stripped the plaster from an interior partition. On the back side (inside),was the penciled note, Plastering done by ***** and ****, and a date in the 1930's. Having done a bit more demo on older buildings, I've found enough similar "maker's marks" to believe it common practice. It just makes sense to me (but I was corrupted early). I value any signed object more highly than I do a similar unsigned tool or item. I don't believe I'm unique in that.