Public domain
Sand Glass of 30 Seconds
From the collection of Rijksmuseum, Amsterdam. Free to download, adapt and use — no permission needed.
About this work
The hourglass is mounted between wooden plates held together by brass bolts.
Rijksmuseum, Amsterdam’s own descriptionSubjects
Credit lineSand Glass of 30 Seconds. c. 1860. anonymous. Rijksmuseum, Amsterdam. Public domain.