Looked like a magazine fold to me, but you may be right.Look just below her belly button.
Her face reminds me of Princess Diana.
With the advent of tanning beds in the mid 80's or so the tan line look became more rare.A lot of these ladies would look so much better if they shaved.
Hmm, I guess we know my preference now...
Ooooh, hadn't considered that, there's something weird there.Looked like a magazine fold to me, but you may be right.