Instructors for dial switchovers, Los Angeles County, Calif., 1937

3 photographs of women with dial units and maps, with a single other woman or a group of women, probably in Los Angeles County, California, 1937 October 4. "Client: So[uthern] Calif[ornia] Telephone Co[mpany], Harold Tucker, Mr. Museter; Operator's report - name: 'Dick' [Whittington]; out of city 15 miles; Amount: 10.50" - on envelope.