Question about SH21 movement?

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ian@ianhampton.co.uk
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Question about SH21 movement?

Post by ian@ianhampton.co.uk » Sat Feb 16, 2019 4:51 pm

Hi, I recently got a C8 M2.04 with the SH21 movement - does anyone know if both spring cans should rotate when winding?
I let the movement run down to less than 1 day reserve, when I wound the movement only one of the spring cans seems to rotate. Is this normal or is there a problem?
Thanks in advance for any advice.
Cheers,
Ian

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Robotaz
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Re: Question about SH21 movement?

Post by Robotaz » Sat Feb 16, 2019 5:00 pm

Mine seems to wind one first and the other just follows along at an uneven rate. They don’t all turn together as I wind.


@robotazky

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Re: Question about SH21 movement?

Post by Bahnstormer_vRS » Sat Feb 16, 2019 5:03 pm

No they don't.

Only one 'can' (with the turbine pattern on it) rotates when winding, although the spring beneath the 'can' will wind on both.

This topic - SH21 Movement - another winding question may help.

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ian@ianhampton.co.uk
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Re: Question about SH21 movement?

Post by ian@ianhampton.co.uk » Sat Feb 16, 2019 6:54 pm

Thanks for the quick responses guys, I guess it’s normal, the watch keeps good time, and the power reserve lasts for the full five days. Just seemed weird.

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Re: Question about SH21 movement?

Post by H0rati0 » Sat Feb 16, 2019 7:51 pm

Ian,

I found it weird too when I first had my C8PR I couldn't see the second barrel move at all when I wound it . But likewise mine runs well within COSC and for the full five days, so I gave up worrying about it!
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Re: Question about SH21 movement?

Post by helicopter pat » Sat Feb 16, 2019 9:51 pm

I have just got 137 hours out of my Concorde from full a full tank.

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