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Servicing a Vintage Swiss Pocket Watch

jdrichard
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jdrichard Distinguished Member

jdrichard

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Here are the disabled pieces. This watch was not running and had a bad case of too much dirt and old age. The watch also had a very slight bend in the face causing it to lift a bit by the second hand. I also had no space washers on the canon pinion hour gear, to prevent the face from pushing down on the gear. I added three small pieces of tape to form the needed gap. The jewel holes were all fine and the keyless winding mechanism was working well. 7081956522c20ec2f71019e9e7ce5d54.jpg1d838003bd33f5494b4e4e5dbb1dbf65.jpg22249666997787be7ba04010194b7f26.jpg298d6da648b01a245d5cf926afc08098.jpgbc8addee755a2266a2ea995ddcd5a32b.jpgfbbd9db26e01c86f56af5019c8e174fe.jpgc88696f796c57a73ac54da5f80b9f201.jpgf5ce761d72657af5679d487c62b9a339.jpgef1fe025d1fa51c3d2142cd6b0e52bff.jpg526335358b19a3ca97669b999645288a.jpg8f37a57c3a21b748ec9f2a81ba19f948.jpg


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jdrichard Distinguished Member

jdrichard

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I had a heck of a time trying to get the cannon pinion back on. I tried with my usual tweezers buy it was pushing too hard on the center wheel and the plate. So i used a staking set so all the pressure was only through the center wheel shaft. It worked well.

 

 

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wls1971 Distinguished Member

wls1971

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31 minutes ago, jdrichard said:

First, not sure of the brand of this watch, but here are some markings.

The markings are for Adolph Schild usually movements are stamped A.S but sometimes A.S S.A the second shield mark is a Ebauches Trust mark these shield marks only appeared for a very short while,  possibly only in 1936 but I have read that they appeared on some watch movements as late as 1939 no one is really sure when they stopped using the mark, but your watch would date somewhere within that 3 year period.

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    • ManSkirtBrew
      1972 Bulova President "E" Sea King 11ACACB movement

      By ManSkirtBrew · Posted

      Oh nice. I have a similar wedge style stump for my staking tool, so I'll give that a shot. Thanks!
    • joelcarvajal
      Gamblin Gamsol for cleaning?

      By joelcarvajal · Posted

      Thank you all for the replies!  Very informative! True enough, the Gamsol took some time to evaporate and does leave a residue. So not all naphtha are created equal!  Need to find alternatives then. i was able to try Hexane recommended by Alex and it seems great.  I wonder what the cons are?
    • GuyMontag
      1972 Bulova President "E" Sea King 11ACACB movement

      By GuyMontag · Posted

      Yeah, I saw that in the tech sheet but I don't see how it can be adequately cleaned with the friction pinion still in place. I've accidentally pulled the arbor right out of the wheel once when I used a presto tool to try and remove it. Mark shows how he does it with the Platax tool. Those are a little too pricey for me so I got one of these from Aliexpress and I just push down on the arbor with the end of my brass tweezers. That usually gets it most of the way out and then I just grab the wheel with one hand the and the friction pinion with the other and gently rotate them until it pops off. Probably not the best way but it's seemed to work for me so far.    
    • Zedster
      Movement inserted from crytal side

      By Zedster · Posted

      Thanks, Jon Sounds like a plan. Obviously I'll have the face on so do you think gripping with the holder will create any problems, but I will check in the morning to see how feasible it is but I assume it only needs to be lightly held. As for holding the movement instead of the holder won't be possible in this scenario as one hand will be puling on the stem while the other pushes the spring down. That was my initial concern is how the hell can I do this with only one pair of hands. All the other times I've had to remove the stem hasn't been a problem, apart from the force required to release the stem from the setting lever, but now I need to fit the face and hands its sent me into panic mode. If it had the screw type release things would be a lot simpler but that's life 😀   Another thing I will need to consider is once the dial and hands are fitted and the movement is sitting in the case I will need to turn it over to put the case screws in. I saw a vid on Wristwatch revival where he lightly fitted the crystal and bezel so he could turn it over, is this the only option or is there another method?      
    • nevenbekriev
      Main spring

      By nevenbekriev · Posted

      Hi Jon, do You think that relation spring torque - amplitude is linear? I would rather guess that the amplitude should be proportional to the square of the torque. I had once idea to check it, but still haven't.
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