1st work:
Arnold Schalks (1995) Heidegger, Being and Time.
A ring with the stone/diamond replaced by an eraser.
(the original is lost)
2nd work:
Evelien Mattheij (2012) Spijker
I bought this work at the artist’s final exam from art school.
A convincing wall needs to be made with a solid nail with a head on which there is a nice grid.
A motor makes the nail rotate slowly.