Okay, here is the best available shot of the as yet unidentified fourth woman from my vintage photographs:
And here is a mosaic of all the candidates she could possibly be. There was one other woman, but she reminded me of a duck so I eliminated her to get the 6×6 square. I probably could’ve eliminated another dozen or so candidates, but I left everyone else in because I like the way the big mosaic looks. I believe there are five or six possible matches, but I’d be interested in hearing your thoughts.
UPDATE #1: Added a new mosaic with the designations on it for easier discussion.
UPDATE #2: Added an edited mosaic with the first round of eliminated candidates clearly marked. These were based on Homey’s “narrowing-down.jpg”, comments from LT and Cranky, and my own personal opinion.