Several issues of the Herald from the '50s and '60s were donated to Christian Literature for Africa, where I work. I don't think we'll send them to Africa, but I've had some fun looking through them.
They regularly listed prayer requests from anyone who sent them in.
Missionary addresses were freely listed with no thought to their safety.
The Dec. 1955 issue give the yearly stats. There were 4,090 church is the U.S., with 190 in Canada and the British Isles and 40 overseas home-missions areas (considered domestic). There were also 608 church on Foreign Missions Fields and 725 mission stations and outstations.
Stephen S. White was the editor. Care to guess who the General Superintendents were in 1955?
We also received several issues of Church School Builder, a Nazarene Sunday School magazine that I don't even remember. In the August 1954 issue they introduced a new "build-up picture" Bible story tool called Nu Vu.