6139 Proof crystal gasket ring work round. - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
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Old 01-22-2018, 05:08 PM   #1 (permalink)
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Default 6139 Proof crystal gasket ring work round.

Like I said in this post I had no idea about the different rings and now I do and need another they seem hard to get hold of so I decided to see if I could machine one of the more common "fat" ones from the later models to work in the Proofs.

Ivor gave me a thin one (thank you) so I had a model to copy which really helped.

Basically all I did was machine a set of soft jaws on the Myford so that i could hold the ring and reduce the thickness from 1.30mm to .8mm, I took my time and only removed .1mm a time and it all went well with no problems, I thought it was stainless but it appears to be coated brass which made it easier to machine.

I then built up my spare notched case (thanks again Ivor )with no problem which is for another Proof 6139 that i am restoring in the near future, just need a two piece sweep hand and proof case back and it will be ready to go for a service.

It's nice when there is an easy work round for a little problem







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Old 01-22-2018, 05:47 PM   #2 (permalink)
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Nice job John!

As we had been discussing them I was thinking it may be possible to machine one down with the equipment you have on hand. That's why I mentioned the thickness between the two of them.

Whew, that was close! Another part saved on my end............
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Old 03-02-2019, 08:18 AM   #3 (permalink)
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I recently sent a proof 6139 for servicing by Simon(thanks) and after assembling he had a problem, the inner chapter ring would not rotate.

After stripping it back down he found what the problem was, it was my machined seating ring, bent and not machined evenly all the way round as there was a .13mm (.005") variation when checking the ring in different places, so basically a crap machining job (by me) oh well its a hard life being a WIS

Anyone got an original ring they don't want ?

So be aware.
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Old 03-02-2019, 10:28 AM   #4 (permalink)
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Tiger I probably do have a spare thin early notch flat crystal ring. Let me check.
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Old 03-02-2019, 12:42 PM   #5 (permalink)
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Quote:
Originally Posted by Grammarofdesign View Post
Tiger I probably do have a spare thin early notch flat crystal ring. Let me check.
Thanks Jon, my idea was good but my implementation on this one was bad

But it did work fine on another so not all bad
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Old 03-02-2019, 05:12 PM   #6 (permalink)
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Hi John,

You do realize that there are 2 different rings that fit under the dial, as well. One is tapered and the later style has a straight wall to a taper on the bottom part. Some of the rotating rings have a too small a diameter to fit the straight/taper style but will fit the taper style.

They may be nothing wrong with your crystal ring. The inner ring may be wedging on to the wrong dial ring.
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Old 03-02-2019, 07:42 PM   #7 (permalink)
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Quote:
Originally Posted by mmounce View Post
Hi John,

You do realize that there are 2 different rings that fit under the dial, as well. One is tapered and the later style has a straight wall to a taper on the bottom part. Some of the rotating rings have a too small a diameter to fit the straight/taper style but will fit the taper style.

They may be nothing wrong with your crystal ring. The inner ring may be wedging on to the wrong dial ring.
Thanks Mike you did mention that before I will check with Simon that he is using the correct ring, I did send him one of each I believe.

Thanks.
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