Sundial - astronomical rings H21


Universal sundial - for determining the time at all latitudes. One of the most versatile sundials of the 17th and 18th centuries. In addition to its functionality, the sundial is distinguished by the unusual form of astronomical rings. It is a tasteful and extremely original decoration for a desk or chest of drawers. This sundial will make a sophisticated gift for an engineer, astronomy enthusiast, sailor, or seafarer.


Sundial - astronomical rings H21 specifications:

·Dimensions: height with stand 12 cm
·Diameter: 10 cm
·Weight: 175 g
·Material: Made of zamak and brass, lacquered in accordance with technology from past centuries. (Zamak is an alloy of zinc with aluminum, or with aluminum and copper. Manganese, magnesium, and titanium are also used as additives)
·Stand: wooden
·Rich ornamentation
·User manual in the following languages: English, French, Italian, and Spanish
·Gift packaging: beautiful gift box with insert


The instrument consists of:


- a throne - a movable suspension enabling the latitude to be determined. The throne can be moved to set the correct latitude.
- a meridian - a fixed ring with a latitude scale
- a movable "equatorial" ring with an hour scale
- a movable declination scale for determining the months (in the center of the device) - functioning like a gnomon. Each month is divided into three periods of 10 days. The names of the months are symbolized by letters, e.g. O - October. In the middle there is a tiny movable element that enables the correct month and date to be set.


How to use the device?

To read the time, unfold the equatorial ring so that it lies in a plane perpendicular to the meridian. Then determine the latitude using the throne. Set the correct date on the declination scale. Suspend the device by the throne after setting the actual latitude at which you are located. The sun's rays will indicate the correct solar time. Please remember that official time may differ from solar time.