Aleksandr Boldyrev sundials
Sundials and cultural artifacts
Horizontal sundial for the geographic coordinates of Saint Petersburg
Specifications
Single copy. Patinated brass. Diameter 284 mm, weight 345 g. The dial thickness 3.5mm. The thickness of the gnomon 10 mm.
Price 35 000 R.
Related information
Description.
The instrument measures the time with an accuracy of 1 minute and is designed for calibration watches and mobile phones. To set the time on a wristwatch or a mobile phone, add 1 hour 59 minutes to the reading of the instrument and add the equation of time. In the center of the instrument, the detailed equation of time graph is etched. The instrument has an additional scale corresponding to daylight standard time in St. Petersburg. The instrument comes in a wooden box.