Since the hours appear to be equal, this looks like it's not meant to be much more than an elaborated noon mark. The reversed PM numbers tell you (roughly) the number of hours before sunset.
> Hello All, > > A friend returned from Italy with this photo (94kb) of a vertical dial. > Some of the numbers are hard to read, but near noon they seem to run X, > XI, XII, V, IV, III. Can someone explain this to me? I do not know wall > declination or the angle of the gnomon. > > -Bill > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
