Elsa Gramcko (April 25, 1925-994) was a Venezuelan artist. Her earlier works were mostly paintings; she expanded into sculpture and assemblage in the 1960s and 1970s.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Elsa_Gramcko
El Ojo de la Cerradura (The Keyhole) by Elsa Gramcko
1964 / Car-battery cells, metal lock, and mixed media on masonite / Private collection
Elsa Gramcko on Artnet: http://www.artnet.com/artists/elsa-gramcko/
Google translation of “Elsa Gramcko. The spell of transforming waste into art”