general/15th-century-inventions
Surf Wiki
Brace (tool) (1)
Gun port (1)
Mariner's astrolabe (1)
Mainspring (1)
Fusee (horology) (1)
Stackfreed (1)
Brace (tool)
Type of hand drill
Gun port
Opening on the side of a ship's hull
Mariner's astrolabe
Nautical navigational instrument
Mainspring
Spring used as clockwork power source
Fusee (horology)
Mainspring force equalizing pulley in timepieces
Stackfreed
Clockwork