T he wittnesses in those days were called Colporteurs.
They went from house to house carrying wind up phonograph players
and played the records to the householders.
The Seventh-day Adventist Church calls their book distributors
"Literature Evangelists", but until about 1980, the term "colporteur"
was used to describe SDA literature evangelists.
Also, Jehovah's Witnesses who were active in the full-time ministry
were called colporteurs until 1931.
They carried phonograph or gramaphone record players.
Today, those participating in the full-time ministry are called "pioneers".
These records are historical pieces and should be donated or sold to
a theological library, like Regents in BC.