The small shell can show the True Local Time with
an accuracy of about 15 minutes. The shell is turned to the sun
in such a way, that the sun shines through the small hole that
can be found near the top. When the sun illuminates the bright
metal plate, the shell can be rotated so that the thread of the
plummet lies onto the engraving. The time is found at the
cross-point of the thread and the date on the shell.
«The good old times» – it could not
have been so good after all. The engraving CARPE
DIEM (use the day) might have induced guilt and stress to
the owner anytime the sun-dial was consulted. I say thy:
tempora tempore tempera.