Eva Hesse’s latex and fiberglass pieces from the late 1960s have been reunited from five institutions. Their rapid deterioration makes their future uncertain — which may be their best quality.

Eva Hesse’s monumental work of art “Expanded Expansion” was kept in storage at the Guggenheim Museum for nearly 35 years. In the 1990s, the work was deemed unexhibitable.

SFMOMA. Photograph: Katherine Du Tiel And this episode’s Work of the Week is Untitled or Not Yet (1966) by Eva Hesse, which is in a new exhibition at The Courtauld in London, called Abstract Erotic.

Eva Hesse, No title) (1964–65). Courtesy Phillips. It so happens that the previous day, at Phillips New York, another Hesse will be on offer. No title (1964–65) is estimated at $35,000–$45,000.