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/

Further reading:
https://hyperallergic.com/480543/contesting-modernity-informalism-in-venezuela-1955-1975-museum-of-fine-arts-houston/
https://milenaolesinska77.medium.com/elsa-gramcko-abstract-sculpture-and-painting-d54c7b88e03f
Google translation of “Elsa Gramcko. The spell of transforming waste into art”