What iconic motif is featured in Dali's "The Persistence of Memory"?

The Persistence of Memory is a 1931 painting by artist Salvador Dalí and one of the most recognizable works of Surrealism. First shown at the Julien Levy Gallery in 1932, since 1934 the painting has been in the collection of the Museum of Modern Art (MoMA) in New York City, which received it from an anonymous donor. It is widely recognized and frequently referred to in popular culture, and sometimes referred to by more descriptive titles, such as "Melting Clocks", "The Soft Watches" or "The Melting Watches". The well-known surrealist piece introduced the image of the soft melting pocket watch. It epitomizes Dalí's theory of "softness" and "hardness", which was central to his thinking at the time.

Source: Wikipedia