This woman had been unidentified for years, until a bloke named John Eaton, spotted her on an advert for Community Silverplate Cutlery. Turns out, she is a teacher.
She is part of En Morn (1947), by Kurt Schwitters.
The square is cut from the little booklet that accompanied the exhibition, ‘Schwitters In Britain’ (2013) at Tate Britain.
You can see the whole piece here .