C.B.S. recording equipment, Los Angeles, Calif., 1939

8 photographs of equipment at a Columbia Broadcasting System affiliate, probably Los Angeles, California, 1939 October. Included are microphones, a lacquer (acetate) record and recording equipment, an "On the Air" sign, program schedule, clock, and an a billboard "It's a fact. Official ARA gasoline tests, is better than 21¢ gasoline".本数据集收录8张拍摄于1939年10月的照片，拍摄场地为美国加利福尼亚州（大概率为洛杉矶）的哥伦比亚广播公司（Columbia Broadcasting System）附属台，照片内容包含该台的各类设备：麦克风、漆盘（醋酸酯）唱片与录音设备、"On the Air"开播标识、节目单、时钟，以及一块印有"千真万确：经官方ARA汽油测试，其品质优于售价21美分的汽油"字样的广告牌。