Oh man, have you opened that thing up to really look at the stitching? I found an old medical textbook from the 1880s at a flea market once and the way those signatures were laced onto the cords blew my mind. Every single thread was done by hand with such precise tension, no glue or machine work at all. It made me realize how much patience those old bookbinders had compared to just slapping things together with a perfect binder today. The spine was basically dust but the sewing held it together solid for over a hundred years. I actually took a few photos of the binding before I resold it because I wanted to try and copy the method on my own journals. It really changes how you think about the whole process when you see it done that well.