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I've done some research and can't find one of these anywhere but would be dumbfounded if they didn't exist, surely sidereal wall clocks are sold somewhere (preferably online)?

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    $\begingroup$ Buy a regular pendulum clock and then shorten the pendulum by 0.56% $\endgroup$
    – James K
    Jun 19 at 20:32
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    $\begingroup$ A quick Google search turned out this website: brgprecision-com.3dcartstores.com/Sidereal-Clocks_c_37.html $\endgroup$
    – Pierre Paquette
    Jun 19 at 21:29
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    $\begingroup$ Wow. Those clocks aren't cheap. If you can do electronics, you could probably build one using Arduino or Raspberry Pi for a fraction of those prices. $\endgroup$
    – PM 2Ring
    Jun 20 at 6:00
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    $\begingroup$ I know Willmann-Bell used to sell a kit, you might try to find an old one. There were some other kits available too. All of them were digital, and could be done quite trivially with any computer and display today. $\endgroup$
    – Greg Miller
    Jun 20 at 16:05
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    $\begingroup$ I’m voting to close this question because this question is Off-Topic $\endgroup$
    – Furious Arcturus
    Jun 22 at 13:38

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