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Our calendar starts from January 1st, 1600, and ends at December 31, 2799. It can be used in a variety of ways, but the simplest example is that of working out the day of the week of a particular event or date in history. On the rear of the dial, we find an image of the moon, and a movable piece of metal. We enter the year, and the calendar gives us a letter - the so called Dominical letter - for that year. We then turn the dial over to the face that shows the sun. Again there is a movable piece, which we adjust until the Dominical letter that we found earlier lines up with the month in question. We can now read off the day of the week for any particular date in the month.The calendar is made of a brass coloured metal (actually a zinc alloy) and comes with a small wooden stand - as shown in the picture. There are instructions, and everything comes in a very smart presentation box. The calendar itself is 90mm in diameter, and the box is 15 x 22 x 3.5cm.The calendar is made in Spain, and the letter of the week are therefore L (lunes - Monday) M (martes - Tuesday) X (miercoles - Wednesday) J (jueves - Thursday) V (viernes - Friday) S (sabado - Saturday) and D (domindo - Sunday)It would make a very elegant gift for the person that has everything!Ask a question about: Everlasting CalendarPeople who bought this item also bought: