Drebbel's sundial

Post date: 28-Jun-2013 16:07:25

Richard SantaColoma sent us the image below of the "diptych sundial"  from the Adler collection in Chicago. 

Who knows how this instrument reached Chicago ? Via Governor, John Winthrop and one of the Kufflers? (zie Questions)

The year 1579 is remarkable: did the seven years old Cornelis know how it worked? Or has this inscription been added lateron?