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Chris_Dixon

A sub-dial that goes up to 40. Mind Blown

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At a recent visit to a country house, I found a clock like the one pictured. Made (or retailed) by Grants of London it had two sub-dials.

One was a simple strike / silent dial, so no problems there, but the other which was reading 34, had 40 at the 12 o'clock position. I asked a couple of people in the house why but no-one could explain the answer. I suspected it might be the date, but if that were the case I've only seen them going to 31. The dial in question is top right in this very poor picture.

Can you help me out of my wondering.

IMG_0847_zpsiixjange.jpg

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Was the clock running?

My best guess would be a power reserve indicator for a 40 hour movement.

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20 hours ago, AVO said:

Was the clock running?

My best guess would be a power reserve indicator for a 40 hour movement.

It was running, but that dial didn’t move, at least as far as I could see. However, I do like the idea of a 40 hour power reserve. I guess I should have waited an hour. 

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Humidity???accuracy would be affected by pendulum length in turn affected by humidity . 

Possibly too old for a temperature dial in degrees centigrade 

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