73% Lofted Estron, 27% Banlon.
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Circa 1968.

Estron is Eastman’s trademark for acetate (see http://www.eastman.com/Literature_Center/A/AY1.pdf).
Banlon is a crimped nylon (see http://vlex.com/vid/bancroft-sons-shelley-knitting-mills-...)

As such, this is similar to Bucilla Paradise, but a lighter weight.