1790 portable compass sundial.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...l_fullsize.jpg



Previously:

1570 Sundial ring - photo
3D-printed "digital" sundial - video
Multi-paneled sundial for time in different countries - photo
World's largest compass rose - GIF
ancient Chinese south-pointing chariot
Using an analog watch as a compass - photo