LAST 1/2m: Vintage Fabric 1980s Super Soft Cotton Blend Grey w/ Squiggles

Fabric: lovely light skirt weight fabric with a soft hand and drape. Not sheer - it has a tight weave and is quite heavy for it's thickness. Charcoal grey base with pale grey squiggles. Burn test indicates mostly cotton with a blend. The grey changes from lighter to darker in different lighting conditions - see the last two photos.
Condition: unused, unwashed
Width: The fabric is 88cm wide selvedge to selvedge.
Purchase size: this last piece is 88cm wide x 49cm-50cm long