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Horological Meandering

TIMING ADJUSTMENT question

 

Hi guys,

I have been wearing a 7750 based chrono (IWC 3705, a huge favorite) for a while and it's kept great time. A week ago, my beloved wife placed my beloved IWC on its crown, and there it stayed for about 8 hours. The next day, it was 25 minutes slow. It has now stopped running altogether after a few hours each time, unless being worn...

I placed it on its side, crown up, and it keeps good time.

On it's back, loses time, minutes.

On its crystal, stopped completely after a few hours. (?!)

Placed it in a pouch and put away for a day--it stopped running after a few hours even though fully wound.

WHAT HAPPENED?

Any instructions on how to adjust it back to normal?

Do I have to send it in for service?

Thank you.

M

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