Winding Stem For Unknown Mechanism

[nambutler]

Hi

Can anyone recognise this mechanism. It's fitted to a copy omega which has some sentiment value to me. Im looking for a replacement winder stem

Here's the stem against a similar stem which is too small

The mechanism in question

I've also been told I can get the small piece out of the crown by leaving it in aluminium potassium sulphate solution to resolve the steel stem. Is this a recognised way of recovering a crown?

Any help would be really appreciated

Best regards

Mark

[ramrod]

it's a recognized way of removal - in fact, it's something i have to do with a seiko crown.

i was told that the alum will attack only the stem leaving the crown intact. however, someone else replied that some of the stems are stainless steel. which would technically eliminate the effectiveness of the alum.

so the answer is: maybe.

i'm gonna try the alum on my stem anyway.

[rogart63]

I have seen fake omega movements. They are really Miyota 8215  copies. Could this be the same? 

See if i can find a Miyota stem to compare with?? 

Edited December 10, 2015 by rogart63

[nambutler]

I have seen fake omega movements. They are really Miyota 8215  copies. Could this be the same? 

See if i can find a Miyota stem to compare with??

Thanks.....fingers crossed! Appreciate your help

[rogart63]

Thanks.....fingers crossed! Appreciate your help

Nope that looks different . But read that it could be a ETA copy. So a ETA 2824 or 2836 stem would fit . Did n't have one but found pictures on the net. And they look the same . you could measure and see if it would fit?http://www.windingstems.com/eta.php

Look under the 2824-2 stem. There is more info.

Or measure the A and E on your stem and enter them in the search . There will come up suggestions on fitting stems . 

Edited December 10, 2015 by rogart63

[nambutler]

Nope that looks different . But read that it could be a ETA copy. So a ETA 2824 or 2836 stem would fit . Did n't have one but found pictures on the net. And they look the same . you could measure and see if it would fit?http://www.windingstems.com/eta.php

Look under the 2824-2 stem. There is more info.

Or measure the A and E on your stem and enter them in the search . There will come up suggestions on fitting stems .

Thanks. I'll give the a try and see what comes up. Much appreciated

[nambutler]

I'll have get a digital calliper to confirm the lengths and general dimension......;-(

[Andyclient]

From your pic there looks enough left to use a stem extender if you can't find a new stem and alum powder does work on a steel stem in a stainless crown it's helped me out before

[rogart63]

From your pic there looks enough left to use a stem extender if you can't find a new stem and alum powder does work on a steel stem in a stainless crown it's helped me out before

Why didn't i think of that ? Good tips. A stem extender would probably work fine. 

[nambutler]

I've ordered a stem extender so I'll give that a try first. I'll continue to look for a replacement. It it worth using a thread lock product when installing a stem extender?

[Andyclient]

I've ordered a stem extender so I'll give that a try first. I'll continue to look for a replacement. It it worth using a thread lock product when installing a stem extender?

I would use a spot of threadlock personally

[nambutler]

I would use a spot of threadlock personally

That's what I thought! Better safe than sorry

[rogart63]

Put some threadlock in the crown when you are done also. Otherwise it may loose it when you set the time.

[nambutler]

Thanks guys!

[nambutler]

Thread extender works! Result!!