Mr. Bali Hai of Goofbutton says this photo of a cute female nerd on a telephone pole is the "best picture ever." He might have something there.
UPDATE: Here's a picture of the ad with all the copy. It reads, in part:
Alana MacFarlane is a 20 year old from San Rafael, California. She's one of our first women telephone installers. She won't be the last.
Additional research says that this was a full page color ad in Life Magazine May 12, 1972.
(Do you think this is the same Alana MacFarlane? I do.)