Here's the schedule for NBC's experimental station W2XBS in New York City for the week starting Sunday, August 13th, 1939, straight from television listings printed in The New York Times. There was a rare broadcast on Sunday (tennis finals from Rye, New York) and the usual assortment of variety and films. On Wednesday, August 16th part of the variety hour was a discussion on "How to Exercise the Baby," something I would very much like to see. There were also two pick-ups from the Worlds Fair, although the Saturday, August 19th broadcast was tentative in the weekly listings and vague in the daily listing. I don't know what the film titled "Grand Illusion" (broadcast on Friday, August 18th from 8:30-9:30PM) was; the famous Jean Renoir film of the same name (or, more specifically, La grande illusion) was released in 1937 but it ran longer than an hour.
Sunday, August 13th, 1939
2:30-5:30PM - Finals of Eastern grass court tennis championships, at Rye, N.Y.
Tuesday, August 15th, 1939
12-1:00PM - Earl Wild, pianist; films; Alice Cornett, singer, and news.
4-5:00PM - Parade and pageant of Volunteer Fire Departments, at World's Fair.
8:30-9:30PM - Film, "Death Goes North."
Wednesday, August 16th, 1939
12-1:00PM - Discussion on "How to Exercise the Baby;" films; George Ross, Broadway columnist; shoe styles; and news.
Thursday, August 17th, 1939
12-1:00PM - Fashion show; films; "Facts and Fancies," Alice Maslin, and news.
8:30-9:30PM - Film, "Three of a Kind," with Evelyn Knapp.
Friday, August 18th, 1939
12-1:00PM - "Designing of Stage Sets," Victor D'Amico of Museum of Modern Art; films: "Total Eclipse," a Negro comedian, and news.
4-5:00PM - Water Ballet, at Manhattan Beach.
8:30-9:30PM - Film, "Grand Illusion."
Saturday, August 19th, 1939
4-5:00PM - Pick up from World's Fair (tentative).