This is a mechanical module to be placed on a compass to derive the time from the Sun's position. It needs to be turned 90 degrees to the compass "doghouse" and the compass pointed North, then the pointer needs to be set to the direction of the Sun. The design is fit with no clearance so after printing, parts will need to be hand fitted. There are also cavoites for the accuracy (time-zones, daylight savings time, etc.) You will also need to correct for magnetic declination. I posted more information (poorly, in html)

Here: https://brainlubeonline.com/CAD/HAT/