Antique/Vintage Blue Lace Woman's Handkerchief

It's an antique, I received as a gift over 40 years ago. Never used, still in package & package shows age. White lace has not yellowed. Never even unfolded, I've kept it in my dresser draw ever since I received it. From Brussels as seen on label (pic#2). Light blue in color with lace trim. Bought at The Old Brussels Lace Shop Grand Place Bruxelles