[Iowa_Watchman]

Reference: 117STZ013899

Confirmed by someone directly from Omega. Price is $212 plus shipping. I’ve already got one ordered, but since the watch was just released a couple of days ago there’s no guarantee on when it will actually ship. But it is currently available in the system for anyone with a parts account to order.

I do believe it’s 1mm wider, but from all of the pictures I’ve compared the connections look identical. We shall see!


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[Iowa_Watchman]

Hi everyone. I received an update from Omega (specifically the Swatch spare parts department in NJ) this morning:

"The part number for the [chronoscope] clasp is O117STZ013899, this is on backorder 4-6 weeks after the order is placed and retails for $211.00 plus $10.00 ground shipping and applicable sales tax. Please be advised that clasps are not interchangeable between bracelets."

So this confirms the part number and price Iowa_Watchman mentioned above. What remains unclear is exactly what "not interchangeable" means. What we really need to know is whether the Chronoscope clasp can be physically and securely attached to the 3861 Moonwatch bracelet, albeit with a bit of side-to-side overhang due to the 1mm difference in width, and what that will look like.

Correct and I’ve already got one on order, so happy to be everyone’s guinea pig!


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[Iowa_Watchman]

I have good news galore. I got the call yesterday that the clasp I ordered was ready to be picked up. I dropped by earyl this morning with my Speedy Pro and handed it over to the OB's watchmaker. Unfortunately I was seated away from him, so I didn't see exactly what he did, which will become more important later.

The good news is that it fits the 3861 bracelet, the great news is that it is a perfect fit in terms of width compared to the bracelet! And the fact that the price was only CHF 200 was just the cherry on top. Even the SA was surprised seeing that apparently a simple pin buckle from a different model already cost CHF 250.

Anyways, there was a couple strange things which made me regret that I didn't see what the watchmaker was doing. First off, as you can see from the pictures below, the Chronoscope clasp (in all pictures the one attached to the bracelet) is slightly longer than the original clasp. When I came in, my 3861 wore slightly loose on my wrist. After the clasp was switched, with the new clasp not set to the extended setting, the watch fit tighter than it did on the old clasp. Yet the watchmaker assured me that he did not remove any links.

Another weird thing is that as you can see on the receipt at the bottom, there are two serial numbers for two parts. And the SA confirmed that there was indeed the clasp and an "attachment piece". As the watchmaker was gone at that point, I wasn't able to get a clear picture on what part the attachment piece was exactly. Also, for some reason the SA told me that they were not able to give me the plastic baggies that held the original parts. As you may know, these show the serial numbers on them. I've purchased parts from them before, and it's the first time they withheld the bags.

Anyways, the watch now fits me better than before, and I am glad to have a quick extension for those hot days when my wrist swells later in the day. I was also able to handle the Chronoscope and the Seamaster 300 while I waited, and both are great looking watches!

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Dang, thank you for the great reply and all of the pictures! I have to admit, I’m a little sad I couldn’t be the first to complete this haha. I’m guessing the attachment piece is probably just spring bars or screw bars, right?

I’m actually happy to hear the clasp itself is a little longer (figured it probably was). That should give me a perfect fit with the option of extending if needed. Thanks again!


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[Iowa_Watchman]

I placed my order ~3 weeks ago and was told ~4 week back order. The one posted here must have been the first spare to come out of the factory!

I can’t imagine anything beyond the clasp is needed for the swap. I’m guessing the additional part number noted was a screw cap or something that got damaged.


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[Iowa_Watchman]

UPDATE:

Thanks to @pbandwatches on Instagram (his pics below) it has been confirmed that you DO need a different connecting link for the clasp to fit on the Speedy Pro bracelet. The connecting arm on the adjustable clasp is wider than the standard one. The link pictured is the standard one from the Speedy Pro.

I’ve confirmed that part number is 118STZ013110. Description is “Attachment link clasp assembled steel”. Cost is $65 shipped. You only need the one link, the other side fits as is. Hope this helps!

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[Iowa_Watchman]

Couldn’t you just do the swap here since it’s held on with a spring bar?
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Hmm, interesting question. Looking at my own clasp it doesn’t look like that spring bar is going to be the easiest to get out, but definitely seems possible! He’s going to check tomorrow.


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[Iowa_Watchman]

Is it safe to assume that Omega will be putting these updated clasps in the Speedmaster Professionals in the future? I know Omega has done a slight update to the movement because of issues with the first batch of watches. And ive heard they have fixed the Sharp case edges as well. Are we going to see a 2.0 version of the new Speedy Professional?

Updated the movement, where’s this coming from? First I’m seeing about it.


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[Iowa_Watchman]

Any update? Is it possible to switch over? Thanks!

Sorry, yes it’s possible to switch the “arms” between them and not need the different end link.


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[Iowa_Watchman]

I posted the process of switching the clasp while using the original connecting "arm" as well as the part number on my Instagram @watchonmywrist and it is saved as a highlight on my profile. Not trying to self-promote, just letting anyone know the information/process will always be saved there for future reference.

 

[Iowa_Watchman]

A little glamor shot.

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[Iowa_Watchman]

Hi! Thank you so much for this post!

Question - I have read that a clasp with micro adjust is less comfortable than one without, and that might be a reason Omega did not include it in the Speedy.

In your experience (and everyone with the chronoscope clasp) is this the case ? Any downside in comfort from having this clasp?

cheers

The two clasps are almost identical in terms of shape and size, I'm not sure how one could be noticeably more/less comfortable than the other. I'm wearing the new clasp with the old "arm" and it feels exactly like the previous clasp. I guess it's possible the new "arm" could cause some discomfort that I'm not aware of, but aside from being slightly wider it's the same shape as the old one.

 

[Iowa_Watchman]

Just had my sapphire 3861 Moonwatch clasp updated to the Chronoscope clasp at an Omega AD.
Nice that the Omega AD just did the work in ten minutes without question (very different than how my Rolex AD responded to a similar non-standard request: "We are not authorized to do any non-standard work on any Rolex product."). The Omega AD that I ordered the parts from only said, "Substituting this clasp is non-standard, so these parts are non-refundable if they don't do what you want."

Note the required Chronoscope bracelet replacement link doesn't have the polished, narrow inner links that the sapphire bracelet has, however it's barely noticeable to my watch nerd eyes (probably already mentioned earlier in this thread).
2.3mm is a small adjustment for sure, but it's been better than no quick adjustment, and I'm happy with it.

Thanks so much to all the people that contributed to this thread !

Just to make sure you have all of the info, the Chronoscope bracelet link isn't actually required. You can just swap the folding arm from your old clasp to the new one and use your standard Speedy bracelet link if you'd prefer and maintain the polished bits. Works either way, totally your call.

 

[Iowa_Watchman]

It is from my personal experience swapping the clasp (that terrible picture from my previous post is my own watch 🙃 )

The clasp closes securely and, in my eyes, there's an inprovement with respect to the standard clasp (i.e. not weird gap when the second microadjustment slot is being used), but with the chronoscope link, the clasp would be "perfect".

I'm righ now in the hunt for the chronoscope link (i.e. Part 118STZ013110), since at least in Spain is not available through the extranet :-( ...If you do not want yours, I'll be more than happy to buy it ;-)

In addition, in this post from OF you can find further details about this topic (with much better photos than mine).

Here some pictures where hopefully it may be appreciated how the push button prevents the arm to completely fold into the clasp:
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which leaves a small gap with the clasp is closed:
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That's very interest! And I can't believe I never noticed this (as someone who has suggested swapping the folding arm). I'll have to take a closer look tonight because I'm curious to see it in person, but it definitely doesn't look like it's closing all the way. I'm very surprised the clasp secures at all with the button interfering with the arm. I guess I will be hunting down an accompanying end link now...

 

[Iowa_Watchman]

So…interesting development for anyone in the same boat as me looking for the connecting link. It’s no longer available for separate purchase. I talked to a boutique, an authorized dealer, and a watchmaker with a parts account today. Their systems all showed the same thing, not available for order. It would seem the only way to get one at this point is to order an entire Chronoscope bracelet.


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[Iowa_Watchman]

Just to confirm what others have said, 118STZ013904 is not the correct part. This is the push button/link from the 12 o’clock side of the watch. What is needed is the connecting bracelet link from the 6 o’clock side of the watch to accept the wider folding arm of the clasp.

Well that was a waste of money…

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[Iowa_Watchman]

You are referring to this circled link, correct? I ordered both Chronoscope clasp and the link on Jan 10, and I did not need to use the link.

A friend recently ordered the clasp and was told by Omega that the link is obsolete, so the clasps should be coming with everything you need. I'll update when his arrives in a couple weeks.
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Yes that is the link that is needed and it has not been confirmed by anyone whether it is included with the clasp now or not.

Are you saying you fitted the clasp by swapping the arms between the two clasps? If so, your clasp isn’t closing properly. The thinner arm contacts the push button and keeps the clasp from closing fully (although it still clicks).


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[Iowa_Watchman]

Cool. So the clasp is all that is needed. Thanks for confirming.

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No, the clasp is not all that is needed. I’m a little confused by what Tim is saying, but he had to replace the link for the clasp to fit.

You need both the connecting link and the clasp from the Chronoscope. The connecting link on the 3861 bracelet is narrower and will not accept the Chronoscope clasp.

Edit: hopefully this is helpful (from his picture). The Chronoscope link is the unknown linchpin that everyone is trying to figure out how to get right now.

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[Iowa_Watchman]

Tim, can you help us out here? How were you able to use the link from the 3861 bracelet with the chronoscape clasp? If you can send a pic of the clasp with the 3861 link attached that would be greatly appreciated. I would hate to pay for the clasp and then not be able to use it. Returning it will not be an option for me because I'm overseas. Many thanks.

That’s not what his picture is showing because it’s not possible. The picture he posted shows the Chronoscope clasp and the Chronoscope connecting link installed on the 3861 bracelet. As you can see from my picture below the Chronoscope clasp arm is approximately 2mm wider than the opening on the 3861 bracelet connecting link. It is not possible to install it without swapping the link.

 

[Iowa_Watchman]

Somebody posted that earlier, but the fit was not good. When the Chronoscope clasp is installed with the 3861 connecting link, the clasp cannot be fully closed. Why that person did not realize this immediately is unclear, possibly because the clasp was actually able to partially latch?

I was one of those people and it’s not just the Chronoscope clasp installed with the 3861 connecting link. You also have to swap the folding arm from the 3861 clasp. It’s very hard to tell that the clasp isn’t fully closed because it still snaps like it’s closing normally. I wore it for months without knowing before it was pointed out to me.


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[Iowa_Watchman]

It’s public! All the details here:
The Updated Bracelet For The Omega Speedmaster Professional 3861 — Here Is What's New!

Interesting article, but it still doesn’t make it clear if existing owners are now able to order the necessary parts to upgrade their bracelet. As far as I’ve been told by 2 different sources with parts accounts the connecting link (118STZ013110) is still not available to order separately.


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