Naiad Crown - help with assembly.

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Probo

·Oct 29, 2024

Dear forum,
I exchanged a Naiad Crown mounted on a speedmaster with the intention of mounting it on my newly purchased Seamaster ck 2913-3 from 1959. However, my watchmaker told me that he was unable to mount it due to an incompatibility in the measurements. My question is:

Is the Naiad Crown correct for Seamaster ck 2913?

Were there different versions for the Naiad Crown depending on the reference on which they were mounted?

And if so, do you know if it is possible to mount or adapt to fit a Naiad from speedmaster to seamaster?

I attach some photos of the Naiad crown in my possession.

 

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Probo

·Oct 29, 2024

I had the crown removed from my Seamaster 165024 to make a direct comparison. I remind you that the Naiad in the photos was mounted on a Speedmaster 105003. I appeal to your knowledge and I thank you for the help you wish to give me I attach photos of the comparison

 

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Dan S

·Oct 29, 2024

What specific "measurements" were the problem, according to your watchmaker? I don't know the specifics of these two crowns, but I can imagine that you might also need to replace the stem and/or crown tube for compatibility with a different case and movement.

Before you start replacing parts, I'd suggest some thorough research so you can be sure that it is the correct crown for that watch. The information is out there.

Edited: Oct 29, 2024

 

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Probo

·Oct 29, 2024

Yes, that's right, the watchmaker says that the crown stem measurements are different, as if the seamaster stem was too long for that crown which has some sort of "fit" that doesn't fit into the seamaster stem. Yet I know that those so-called compressor crowns were created for the Seamaster to guarantee a watertight seal. and I saw Naiad crowns mounted on references 2913, 2914, 2915.

 

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Probo

·Oct 29, 2024

On the left the naiad with the graft, on the right the crown of SM 165024

 

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Probo

·Oct 29, 2024

I add that I searched on the forum for information on my research ( DIFFERENT NAIADS SCROWN FOR DIFFERENT REFERENCES ? )but there doesn't seem to be much help on this specific question.

 

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AdamVT227

·Oct 29, 2024

Probo

On the left the naiad with the graft, on the right the crown of SM 165024

almost every movement have it's own stem , so switching the stems is mandatory in this case .
but there’s a chance that the crown itself won’t fit the watch case .

 

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masteroftime

·Oct 29, 2024

You definitely need a different stem. However, I think the watch case tube sizes and crown/stem tap sizes are different.

Btw, the crown from your seamaster is missing the gasket and washer. You should probably consider getting that replaced.

 

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Dan S

·Oct 29, 2024

Probo

Yes, that's right, the watchmaker says that the crown stem measurements are different, as if the seamaster stem was too long for that crown which has some sort of "fit" that doesn't fit into the seamaster stem.

IMO, your watchmaker should be able to tell you what is needed.

 

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Dan S

·Oct 29, 2024

Probo

I add that I searched on the forum for information on my research ( DIFFERENT NAIADS SCROWN FOR DIFFERENT REFERENCES ? )but there doesn't seem to be much help on this specific question.

That might be the worst search prompt I've ever seen. 😅

Anyway, that's not the best approach. Imo, you should do focused research on the particular references of interest, individually.

 

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Probo

·Oct 29, 2024

masteroftime

You definitely need a different stem. However, I think the watch case tube sizes and crown/stem tap sizes are different.

Btw, the crown from your seamaster is missing the gasket and washer. You should probably consider getting that replaced.

Do you mean that the Nadia in the photos is missing the gasket and washer?
I had no idea, and neither did my watchmaker.

However, I understood that the two crowns are incompatible on two different movements and this clarifies my choices. Thank you, your considerations are precious, as always.

 

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Davidt

·Oct 29, 2024

I also don’t believe the ‘Mercedes’ symbol indicates the crown being niaid. AFAIK there are lots of crowns with this logo that are standard crowns.

 

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Probo

·Oct 29, 2024

masteroftime

You definitely need a different stem. However, I think the watch case tube sizes and crown/stem tap sizes are different.

Btw, the crown from your seamaster is missing the gasket and washer. You should probably consider getting that replaced.

To avoid any misunderstanding, do you mean this one in the photo is the Naiad which is missing the gasket and washer?

 

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Probo

·Oct 29, 2024

Dan S

That might be the worst search prompt I've ever seen. 😅

Anyway, that's not the best approach. Imo, you should do focused research on the particular references of interest, individually.

 

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Probo

·Oct 29, 2024

So we can say this: is there a naiad crown compatible with the ck 2913-3 movement of 1959? Because the one in my possession evidently isn't.

 

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Dan S

·Oct 29, 2024

Probo

So we can say this: is there a naiad crown compatible with the ck 2913-3 movement of 1959? Because the one in my possession evidently isn't.

I don't think you know that. It's quite possible that it will be fine with the correct stem and tube. Honestly, it sounds to me like you need to educate yourself a bit more on crowns/tubes/stems, and how they work. Or else, just find a watchmaker that is willing to be more helpful.

 

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Probo

·Oct 30, 2024

I will

 

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Probo

·Oct 30, 2024

oh yes, I need to be educated, this is why I joined this forum. In any case, this morning I had an instructive conversation with my watchmaker who clarified some questions regarding the crown/tube/stem: lesson number one.