Old news, but amazing. As a child, Christopher Becker of Queensland, Australia found this interesting piece of brass in a bag of pipe fittings in a shed on his father’s farm. He’d been hanging onto it for 36 years before learning it was a horary quadrant dating back to 1396. The story is here, and the auction listing has more information.
The numbers stamped into the quadrant are part of the reason I find this interesting. 4, 5, and 7 look very strange. Arabic numerals were just starting to be used in Europe at this point, and their shapes were not yet standardized.