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Noises from 7750-based movements
https://www.breitlingsource.com/phpBB2/viewtopic.php?f=12&t=14414		 Page 1 of 1
Author:  Mofongo [ Sat Nov 21, 2009 9:38 pm ]
Post subject:  Noises from 7750-based movements
I am woefully remiss on posting pics of some of my latest acquisitions. :oops: One of them is a Bentley GT black dial two-tone (1 of 100 made, according to the list on this forum). I was a happy camper to get this one! It has the B13B movement, based on the Valjoux 7750.

One thing I notice is that if I take it out of my winder after about a week or so, if I hold the watch case level, I can frequently hear the rotor spinning around and around and around on its own. It does this well over a dozen times. If I shake it a little, it will often do it 6-12 more times. After that it settles down. The sound is the "sliding" sound, not the "ratcheting" sound, as I know rotor emits different noises depending on which direction it rotates.

I know that it is not possible to overwind it, but I am curious what is actually going on here. Is this something I should be concerned about?

The winder is a Swiss Watch International model WW-121 (like $39 from Chronoshark), set to clockwise rotation. I don't remember the exact TPD, but I did look it up once and it is slightly but not that much over the recommended value for a 7750.

Thanks!

--Mofongo
Author:  bnewbie [ Sun Nov 22, 2009 1:23 am ]
Post subject:  Re: Noises from 7750-based movements
Nothing to worry about, 7750 is just loud.
Author:  Roffensian [ Sun Nov 22, 2009 5:20 am ]
Post subject:  Re: Noises from 7750-based movements
As bnewbie says the 7750 is loud, and what makes it more noticeable is that it only winds in one direction (clockwise). As a result there is very little resistance on the rotor when it's spinning anti-clockwise which is why it rotates more than movements that wind in both directions.
Author:  BoneDoc [ Mon Nov 23, 2009 12:08 pm ]
Post subject:  Re: Noises from 7750-based movements
It is just talking to you. Expressing it's appreciation for the wrist time! :mrgreen: :lingsrock:
Author:  Driver8 [ Mon Nov 23, 2009 12:20 pm ]
Post subject:  Re: Noises from 7750-based movements
BoneDoc wrote:
It is just talking to you. Expressing it's appreciation for the wrist time! :mrgreen: :lingsrock:

I like to think of it as its breathing! :wink:
Author:  Mofongo [ Fri Nov 27, 2009 5:21 pm ]
Post subject:  Re: Noises from 7750-based movements
Pics finally uploaded! http://breitlingsource.com/phpBB2/viewtopic.php?f=5&t=14549

///M
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