Thanks for the pointer.
Page after page, completely filled. The investment in just the mounts alone must have been enormous.

The albums were described as "overfilled". Yes indeed.

(p.s. for others wanting to look, the pictures of the stamps start at photo #14. Pictures 1-13 are just the cover pages and outside of the albums).
In the few places that the stamps were not in mounts, you can see (but not clearly read) the Price Paid for each stamp. If that continues throughout the album that is an additional massive effort and fascinating historical goldmine. I wonder if the buyer is a collector, or a dealer who will break it up into country or single-page lots on the Internet. Either way, that is (was) quite the collection.