Looking a little more closely, I see the main album is the 1956 edition. There are multiple index pages.
Master Global, 1951-1954 editions
Master Global, 1956 edition
One with no identifying description
Flipping through a couple countries, I see coverage extending to 1957-1959 so at least one supplement may also be included.
Some pages have no Minkus numbers while others do.
Luckily I also picked up a pair of Minkus worldwide catalogs from 1961, so those should help a bit if there are any stamps not easily identifiable.
This should be a lot of fun to go through. Although at some point I will need to try to find another copy to use for comparison.
Uh oh, I think I like studying stamp albums.