PHOTOGRAPHIC PROOF OF CHEMTRAILS IN THE SKY OVER CA / AZ IN 1957
from the TV series "tombstone Territory" (1957-1960). the screencap shown is from season 1 episode 11 (sermons and six guns), original air date 12/25/57, so it had to have been filmed before that date. the episode mentioned is early in production, so most likely one of the socal locations, tho old tuscon is a possibility. clearly visible in the YT vid beginning at about 7:27 and in the shot until 7:53 or so.
https://www.youtube.com/watch?v=Es20AaU_rGE