Thank You N.Bird!
I have seen couple pages from the Guatemalan slingshots book a while ago. This recent title you shared is absolute new to me.
Pictures are great, I was referring to a process that could be used to digitize items as 3D models, but instead of laser it uses a set of pictures to calculate points in space. This requires a set of images from different angles, way more that a book can offer.
Photogrammetry is often used to save and document cultural heritage, clone an object for experimenting, like testing something without destroying the original, even helps to calculate cost of repair (since 3D is capable to calculate damaged surface areas and volumes), also helps to assemble a virtual exhibition.
I see how serious you are about collecting, so thought I mention this process to you. Who knows, you might find it's purpose in the future, or just remember it as an interesting novelty (it's quite old actually as a process and comes from geographical-military research called Stereogrammetry).
Here is a video, that shows the basics. Marketing likes to show this as an easy process, but data cleanup requires professional care.
Thanks again for sharing your pieces time after time!
Regards,
Mark