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Lawson

As1012 Service - "little Watch, Big Trouble"

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Hi fellow watch friends, back again with another service for ya :)

 

This one is a woman's bracelet watch that were popular 20-30 years ago ... your Mum probably had/has one of these.

 

post-246-0-13049000-1417796388_thumb.jpg

 

Now when I say this movement is small, I mean it's small ... I don't think I used a driver over 0.8mm on it.  And being small doesn't mean they are more difficult, but you need good optics to make working on them enjoyable.

 

...yes, that's my thumb!

 

post-246-0-02301700-1417796391_thumb.jpg

 

I've worked on a few of these now, and they commonly are held in the Caseback as seen below.  So be careful when removing them so as you don't damage the Dial or Hands.

 

post-246-0-99801400-1417796394_thumb.jpg

 

Once I had removed the movement from the Caseback, I saw my very first indication that this job wasn't going to be a quick service.

Notice that Ratchet Screw?

 

post-246-0-60738300-1417796398_thumb.jpg

 

Here's a close-up of it.

 

post-246-0-41258200-1417796403_thumb.jpg

 

I see this way too much servicing watches, and it's become my pet hate.  King Kong has worked on it before me, and has tighten every screw up to 50 foot/pound ... Arrghhh!!  :growl:

Needless to say, when it came to removing nearly all the screws, it was a battle; but the battle was lost with the Ratchet Screw and I was unable to undo it (even after applying some heat) and it seared off ... so 1x Barrel Abor and 1x Ratchet Screw to be ordered.

My mentor and trainer is a 78 year old master watch maker, and the VERY first thing he impressed on me is not to over tighten screws.  "We are not torqueing down head bolts on a V8, these threads are less an a millimeter across ... use a light touch son.", is what he told me.

I'm sure some old hands here can also add their words on wisdom on this matter.

 

Ok, end of rant :P  Back to the service...

 

Firstly, I removed the Hands and Dial, and as per normal with this style of watch, there was moisture ingress.  These types of watches aren't very well sealed from the elements (no Caseback Seal, no Stem Seal), so you'll nearly always encounter some rust removal in the servicing.  This looked fairly light corrosion, and I was hoping it hadn't gone further into the movement.

 

post-246-0-67899800-1417796406_thumb.jpg

 

Here's one of the reasons this watch stopped.  Heavy corrosion around the lower Barrel Arbor pivot.

 

post-246-0-11219600-1417796411_thumb.jpg

 

Next, as always, I removed any tension from the Mainspring, and removed the Balance and Pallets.

 

post-246-0-55560200-1417796417_thumb.jpg

 

Next I removed the Ratchet (shearing the screw in the process), Crown Wheel, and then removed the Barrel Bridge.

As you can see, very old, dry, and dirty grease.

 

post-246-0-00522800-1417796422_thumb.jpg

 

Main Plate looked in good shape, which saves a LOT of work ... if this thing is covered in rust you've got your work cut out for you.

 

post-246-0-71308700-1417796426_thumb.jpg

 

Pulled the Cannon Pinion, and happily it wasn't ceased, but also is still a good fiction fit.

 

post-246-0-02641300-1417798070_thumb.jpg

 

Here's a reference photo of the Gear Train setup once the Bridge is removed.  Again all looks good and no damage to any of the pivots or jewels.

 

post-246-0-44143100-1417798074_thumb.jpg

 

Stem, Clutch, and Setting wheel are filthy and typical of a non-sealed movement of this age.

 

post-246-0-76697600-1417798077_thumb.jpg

 

On to the Keyless Work, and unfortunately rust had gotten in here too.

 

post-246-0-53565000-1417798085_thumb.jpg

 

The Yoke Spring was the worst of it, but with a little time and effort, it cleaned up fine.

 

post-246-0-54584200-1417798090_thumb.jpg

 

Setting Lever needed a little work too :unsure:

 

post-246-0-40135400-1417798092_thumb.jpg

 

So the parts are in the cleaner, having a bath for the first time in 20+ years.  And I've emailed the good people at Old Swiss Watch to get a new Arbor and Ratchet Screw.

I'll have the assembly post up as soon as the parts arrive, and get this little movement tickin like new!

 

Thanks for reading my post, and I hope this helps and was informative. :)

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Hi Lawson,

 

Wow, good eyes, good pictures, excellent strip down! What else can I say? My friend, you are doing super! This is so complete, I love it. Thank you for posting and sharing!

 

Cheers,

 

Bob

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You certainly have a big wee problem with all the rusty bits. I serviced a cocktail watch a couple of months ago and it certainly test your dexterity. I've no doubt that you will do a great job!

I'm looking forward to to seeing further progress and illustrations.

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Thanks for all the kind words guys :)  This movement has been a fun project.

 

So, today I received the replacement parts from Sudarson at Old Swiss Watches, and as normal his service is outstanding!  Right parts, right price every time!

 

post-246-0-71733500-1418903117_thumb.jpg

 

And they always come neatly packaged in a water resistant envelope, and in tiny plastic parts containers ... soooo cute!

 

post-246-0-36711300-1418903120_thumb.jpg

 

So to recap, the Ratchet Screw snapped off in the arbor, and needed to be replaced. 

NOTICE:  On the AS1012 both the Ratchet Wheel and the Crown Wheel are LEFT HANDED THREADS!!

I have never seen this before, and the screw top is not marked with any indication it's left-hand threaded ... BE WARNED.

So the damage was caused by silly old me :P

Even though it was broken I put the movement back together before ordering any parts to make sure everything else was working well ... so things needed to be disassembled again.

 

post-246-0-80247500-1418903123_thumb.jpg

 

After making sure there was no tension left in the Mainspring, I removed the Balance and Fork.  This is an important step, because you could easily damage the Pallet Stones when removing/refitting the Mainspring.

 

post-246-0-64733000-1418903126_thumb.jpg

 

Off with the Ratchet Wheel and Crown Wheel.

 

post-246-0-97872500-1418903128_thumb.jpg

 

Off with the Mainspring Bridge, and out with the Old Mainspring.

 

post-246-0-74299300-1418903130_thumb.jpg

 

Ready for rebuild

 

post-246-0-35370400-1418903135_thumb.jpg

 

As a complete Mainspring was purchased, I inspected both of them and replaced the one that looked the best ... with the new Arbor.

Then it was just a simple matter of putting everything else back in place :)

 

post-246-0-58144100-1418903138_thumb.jpg

 

All back together, and functioning wonderfully ... ticking away nicely for the first time in many decades.

 

post-246-0-82307900-1418903141_thumb.jpg

 

On with the Dial and Hands, ready to be fitting back in it's movement holder.

 

post-246-0-52853600-1418903144_thumb.jpg

 

NOW comes the issue :notfair: How on earth do I adjust this thing?!?!

It's too small for the timegrapher .. even when you put it in sideways!!

This photo may look like it's being held by the clamp; but it's not, this movement is just shy of the minimum clamping length.  So the timegrapher can't get a good reading

 

post-246-0-76932200-1418903770_thumb.jpg

 

Can I just put a wedge in there, and still be sure of getting an accurate reading?  Advise from one and all would be most welcome.

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Hi Lawson,

 

I'm not sure since I haven't done that size of watches yet, but I believe that the only thing that really matters is to have the crown contacting the mic. Therefore, a piece of some material between the other side of the clamp and the movement might work. Just a guess and hoping I'm not too far off the truth...

 

Hope it works,

 

Cheers,

 

Bob

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Good News Everybody!

 

The watch is adjusted and running happily.

It's not going to be a certified chronometer; but that's not the point of this watch, it's purely a fashion item.

 

post-246-0-65753900-1419611514_thumb.jpg

 

Only one problem though ... I can't wind it!! :(  My **BLEEP** fingers are too big!!

I had to wind the Ratchet Wheel with my screwdriver to power her up :P

 

post-246-0-15088900-1419611518_thumb.jpg

 

 

 

 

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Yep, it is either a very big hand or a very tiny watch! :)

 

Is the lady wearing loupes instead of glasses....OK I can go on with the jokes but I bet you have heard them all! :)

 

It is an amazingly difficult job and a well done one, what you did, Lawson. Certainly a combination of dexterity and good sight+optics. Congratulations on a super job!

 

Cheers,

 

Bob

Edited by bobm12

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Only one problem though ... I can't wind it!! :(  My **BLEEP** fingers are too big!!

I had to wind the Ratchet Wheel with my screwdriver to power her up :P

 

You may find these useful to have for the future. Bergeon watch winders - brilliant little gadgets, especially if you have to wind up twenty watches on test every morning :)

 

Bergeon 30409A & 30409B

 

post-1-0-90112500-1422979996_thumb.jpgpost-1-0-30899100-1422979997_thumb.jpg

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