Useful medieval gadget for calculating the winter solstice, dated 1396; ‘Brought to Light Having Spent Over 20 Years in a Shed in Queensland, Australia’… Went to auction last week, ‘Extraordinarily Rare 14th Century Time-Telling Instrument, Marked with Badge of Richard II, to Sell at Bonhams’… actually, no deal on the rare 14thC timepiece, so save your pennies for next time …!
Astrolabe quadrants are amongst the most sophisticated instruments ever made before the invention of the modern computer. They combine the mathematical and astronomical features of an astrolabe with a much smaller size.
Found at Sydney Morning Herald via here