I wonder why she was barefoot wearing heavy jeans and turtleneck plus leather pullover. It still can be chilly in April here. Today it is in 50s. Her feet were noted as clean also. Not too many women doing heavy farm/agricultural and loading type work then either unless maybe she was raised that way. It does fit with her fitness level. She also must have had good dental care most of her life with the condition of her teeth noted. I grew up in the 50s and 60s in solid middle class family and attention to dental care wasn't what it is today. No dental insurance and was a squeeze for most families we knew to pay for extensive dental care. Her very good hygiene too. Some if that doesn't fit with lots of time on the road and a life of hard physical labor. But this girl doesn't seem to fit a lot of the norms of the day which could be why she hasn't been identified. It is hard to imagine someone at some point wasn't looking for her. No older than she was it seems she may have been raised from a young age with good health and hygiene habits and in a family with comfortable income.