German wooden tablet sundial
1771-1800
Equinoctial compass sundial of boxwood
1771-1800
Universal diptych sundial in wood with paper scales
1771-1800
Universal diptych Stockert type sundial, in box (wood)
1771-1800
Universal diptych sundial
1771-1800
Universal diptych sundial
1771-1800
Wooden diptych sundial, for latitude 48 degrees
1751-1800