When I asked about the old Jehovah's witnesses in the Divine Purpose book here, the elders acted as though it had never existed.
The KH where my mother in law attends has the complete collection of Studies In The Scriptures, including The Finished Mystery. It also has a lot of the other publications from that era, including The Harp of God. Watchtowers dating back to the 1930's, Awakes dating back to the 1950's (if not earlier). The Kingdom Interlinears, Emphatic Diaglott, Aid to Bible Understanding, the list goes on and on. I sneak off to the library first chance I get when I visit there.