It doesn't seem genuine to me. It isn't just that there doesn't seem to be a way of moving the upper end of the string to the other latitude-marks. It's also that you can't just change the angle of the gnomon, for a different latitude, and use the same hour-lines.
So there seems to be no purpose for the latitude-marks on the inside of the vertical, piece--other than to make it look adjustable for latitude. Michael Ossipoff On Mon, Feb 20, 2017 at 9:57 AM, Dan-George Uza <cerculdest...@gmail.com> wrote: > Hello! > > There's a diptych sundial on sale for about 80 euros supposedly dating > from 1920. > > Do you think this is genuine? I think it is a modern replica. > > http://anticariatulnou.ro/diverse/antichitati-artizanat- > colectionabile/cadran-solar-cu-busola-antica-din-lemn-diptic.html > > The string does not seem to be adjustable for latitude, I see only one > hole (it's fixed at 42 deg.). Why then go through the trouble of printing > the latitudes for European cities on the back? > > One thing I find interesting is the plumb bob and the orifice on the > vertical plate. I think it is meant to align the piece to the vertical. I > haven't seen this before. > > Thanks, > > Dan Uza > Romania > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > >
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