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‘Remember the Shabbat and keep it holy. Six days shalt thou labour and do all thy work. But the seventh day is the Shabbat of the Lord, thy God…’ says one of the Ten Commandments which according to legend Moses received from the Creator on Mount Sinai.

In Judaism, the Shabbat is no ordinary day of the week. It is a time when the world is filled with peace and calm, when families gather round the table to celebrate the miracle of serenity. During the Shabbat, the Torah calls people to distance themselves from the chaotic noise of weekdays to realise that the world has already been created and, for one day, can go without man’s help. Six days a week, people strive to rule the world but on the seventh day, they must strive to master themselves.

39 types of work are forbidden on the Shabbat, including Makeh Be’Patish or the ‘last strike of the hammer’, one of the most widespread. This term denotes any action that serves to prepare an object for operation, including the winding of a timepiece.


Konstantin Chaykin has thus invented a clock that respects the Shabbat. The patented mechanical device either provides the energy lacking to the spring to ensure the timepiece does not stop, or it stops 5-6 hours before the Shabbat begins. The timepiece’s power reserve is shown on a separate display.
When working on this model, Konstantin Chaykin was inspired by the beauty and complexity of the Jewish calendar, which is based on the movement of both celestial bodies. The dates and times at which all holidays begin are calculated using the duration of the lunar month and solar year.
Gilded Hebrew letters are positioned next to the hour-markers on the main dial. The date and month displays are shown on a separate dial. The one-minute tourbillon carriage is shaped like the Star of David. The winding key, which breathes life into this special timekeeping device, is kept in a miniature drawer.
All inscriptions on the clock are in Hebrew. Beneath the dial placed a plate bearing a phrase from the Tanakh (book of Tehillim): ‘So teach us to number our days, that we may apply our hearts unto wisdom’.
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