acrosscenturiesandgenerations:▪Portable diptych sundial. Maker: Hans Tröschel the Elder (German, 154
acrosscenturiesandgenerations:▪Portable diptych sundial. Maker: Hans Tröschel the Elder (German, 1549–1612) Date: ca. 1598 Culture: German, Nuremberg Medium: Ivory, brass -- source link