Red Cross Nurse's Handkerchief, Presumed WWI

I believe this is WW1,  a (near) white gauzy handkerchief with Red Cross patch stitched along one edge, which would have been used by a nurse for all sorts of  functions, and which to me embodies the very notion of bandaging in an essential and very iconic sort of way. I find it a very tender thing, and very beautiful both for its spareness and history of use.

20 7/8" x 15 1/4". General light stains/toning, all of a piece with it. Fabric is cotton cheesecloth weight.