I remember having friends in school who were JWs during the 1970s. They couldn't do so many things the rest of us kids could. They dressed like they were always at Sunday School instead of like other kids in jeans and tennis shoes. No faithful JW kid in elementary/primary school expected to go to high school as the end of the world was truly upon us.
The books studied were thick and focused mainly on how the experience of the anointed remnant was typified by the accounts in the Old Testament. "Proof" that it was the end was the fact that the anointed remnant was undergoing an antitype experience that was hidden in the Hebrew Scriptures and being unlocked now to be understood. Those with the earthly hope were happy bystanders to this, but they were the "faithful an discreet slave CLASS" among us. So all the studies generally focused in-depth on this type/antitype paradigm of the remnant that was the cornerstone of how "late" and "deep" we were in the end.
The magazines constantly published blurbs on how the world had to end in the mid-1970s. If God didn't bring Armageddon soon, the world would eat itself up before 1980. Destroying the world and slaughtering all the non-Witnesses was actually a loving and merciful act on God's part otherwise humanity wasn't going to survive.
Publications had illustrations that reminded me of Welch's Grape Jelly drinking glasses: line drawings with single-color splashes added here and there. We sold our books and magazines "at cost."
Someone in my area had black on white stickers and bumper stickers printed up and pasted them everywhere around town during 1974 and 1975 that read: "JEHOVAH is coming!"