3861 New Style Speedmaster Bracelet Fitted on 1861 Case (Pictorial)

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I just returned from my local OB and they fitted the Omega Speedmaster "Rising Sun" bracelet on my Saphire 3861 without issue. I think it looks great and it confirms that the older bracelet will fit on the newer Speedmaster - at least the one for the special edition Speedmaster with the adjustable clasp. Here are some pictures and one of them has the reference number in it. My OB ordered, sized, and fit it on my Speedy Moonwatch.


Fantastic, can you provide the "Rising Sun" bracelet part number. Searched and could not find it.

Lastly, how is the fit? is it flush? rattles? is it secure? I know that the end links of the 3861 bracelet has a center interlock.....looks like the "Rising Sun" end links use the old locking configuration with the side flaps.
 
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Anyone know how the last gen bracelet, ref 1998, fits on the new Speedys? Pics would be great!
My 3861 has the 4196 bracelet from my 2020 mfg. 1861. It had a Forstner band on it but after swapping the two everything fits much better. I had to remove the tabs from the 1861 bracelet's end links to get the springbars to line up with the 3861's holes but after that everything went together. It was weird-it looked like the pins should snap into the holes in the lugs but they just wouldn't. There is a bit of play between the curves in the end links and the curves in the case but nothing too serious (see pic). This bracelet was always either too loose or too tight on my wrist when it was on my 1861 but between the different lug distances and flatter caseback on the 3861 and the tiny bit of play in the end links this combo fits my wrist perfectly. Oddly enough, the unaltered 957 bracelet from my 1861 Apollo 11 40th Speedy fits my brother's 3861 just fine. I do think it's irritating and ridiculous that there are a total of two bracelet adjustment holes on the last several generations of a $6000+ watch, but maybe that's just me.

Edit: My brother just sent me the 957 back, so I tried to see if it would fit on my 3861 the way it did on his. It won't.
Edited:
 
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Late to the party but I just picked up the 3861 bracelet for my 2016 1861 Speedmaster. Love the lighter feel and taper over its bulky predecessor (I have small wrists).
 
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My question to the group is the exact reverse of OPs pictorial. Will the older 1861 bracelet fit onto the newer 3861?
 
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After looking at all the pics I think im going to go for uncle Seiko Seiko US1479 bracelet. This is because the fitment for the end links of the new bracelet on the 1861 really pinging my OCD.

US has a new double button solid clasp option too for the polished/brushed version of the bracelet but i'll go for the all brushed with the regular clasp and wait for US to release the all brushed double button clasp later.

https://www.unclestraps.com/collections/speedmaster/products/us1479-omega-speedmaster-bracelet-20mm
 
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Hey guys. So I picked up the new hesalite 3861 over the weekend and got a bunch of questions from people if the new style bracelet will fit on the old style 1861 case.

Because I own both watches, I decided to perform the bracelet swap to answer the question and show you guys the fitment. To skip the long story, the answer is YES the new bracelet will fit the old 1861 case with no problem. I used the spring bars that came with the 3861 for this exercise and the end link fitment seemed almost perfect.



Please see the below shots:

This is a back shot of the new 3861 case with bracelet mounted:



Here is the 1861 on TOP and the 3861 on BOTTOM:




Here are some side-by-side case comparisons of both watch cases (1861 on right 3861 on left):






You can see how the side profile lug shape is different on the 3861. You will also notice the 3861 case height is slimmer.

And BEHOLD, here we have the 3861 bracelet mounted on the 1861 case:







And here is this configuration on my wrist:







I estimate Omega to charge $800+ for this new 3861 bracelet independently should you want to purchase this as a separate item to upgrade your 1861 case. The alignment of this bracelet to the case is pretty much perfect from what I can see and wears quite comfortably, although I personally still prefer the Ed White flat link bracelet but I have confirmed that the case and hole position of the new 3861 case will NOT allow for the flat link to be installed. I tested this with both the Speedy Anniversary end links as well as my Uncle Seiko end links with two types of spring bars.

Best of luck to all of you on your decisions to either invest in a 1861 or new 3861. Either way you cannot go wrong but I hope this pictorial will help you regardless.

Cheers,

M
Thank you for all the info!
 
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After looking at all the pics I think im going to go for uncle Seiko Seiko US1479 bracelet. This is because the fitment for the end links of the new bracelet on the 1861 really pinging my OCD.

US has a new double button solid clasp option too for the polished/brushed version of the bracelet but i'll go for the all brushed with the regular clasp and wait for US to release the all brushed double button clasp later.

https://www.unclestraps.com/collections/speedmaster/products/us1479-omega-speedmaster-bracelet-20mm

One of the "imperfections" of the US is that there's a gap/hole in the middle between the endlink and the first link when you wear it and the first link is hanging downwards. See picture below (using one of their official pictures). This is due to the top side of the endlink being too flat and does not curve down enough. The Omega bracelet has a much smaller gap there.

It may ping your OCD too... but, nothing is perfect...
 
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One of the "imperfections" of the US is that there's a gap/hole in the middle between the endlink and the first link when you wear it and the first link is hanging downwards. See picture below (using one of their official pictures). This is due to the top side of the endlink being too flat and does not curve down enough. The Omega bracelet has a much smaller gap there.

It may ping your OCD too... but, nothing is perfect...
Thanks so much for pointing that out! It doesn't bother me as much as the OE Bracelet endlinks not fitting right.

Hmmm im thinking I may just stick to the US Presidential which i have on there now then.
 
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My question to the group is the exact reverse of OPs pictorial. Will the older 1861 bracelet fit onto the newer 3861?
Mine do, but only if you remove the tabs on the end links. I also recently ran a thin swipe of JB Kwik around the curve on the end links to snug them up to the 3861 cases. You wipe in on, let it dry for about 15 minutes, press your finger into it to get most of the sticky out and then place the watch upside down and press the end links firmly against the case until you see the holes in the lugs center in the slots. It's a bit like glass bedding a rifle. I actually have two set up this way-the 957 is now on my Hesalite 3861 and the 4196 is now on my Silver Snoopy 50th. They look perfect. I also have a 3861 Apollo 11 50th Anniversary bracelet on my Apollo 11 40th Anniversary 1861, but that's another story.
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Sorry to resurrect this thread, but this is still the thread that comes up when you search swapping bracelets to the 3861.

I bought the 3861 bracelet from Omega a year ago to fit on my 1861 and even though I loved the combo I’ll be taking mine off as it looks like it’s going to create problems down the line. As originally stated it’s a ‘near perfect’ fit. But it isn’t perfect. Specifically the spring bars on the 1861 case are a little too far for the endlinks so the endlinks have a little back and forth play. The contact point seems to be mostly just the bottom of the case and that’s livable to me.

The bigger issue I see is the outside portions of the lugs extending past the bracelet seem to be more than just a visual mismatch and verging into metal on metal wear over a longer period of time. The endlinks also have a small amount of lateral play which allows the outside of the bracelet to rub against the inside of the lugs.

Correctly or incorrectly, this wear pattern made me concerned about the longterm health of the case and I’m thinking removing the bracelet as much as it hurts, is for the best,

I dunno perhaps I’m overreacting and this steel on steel contact would just result in marking, but my gut says differently. YMMV, just wanted to add to the perspective as this is about a 750 dollar decision should you elect to buy the bracelet.
 
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Sorry to resurrect this thread, but this is still the thread that comes up when you search swapping bracelets to the 3861.

I bought the 3861 bracelet from Omega a year ago to fit on my 1861 and even though I loved the combo I’ll be taking mine off as it looks like it’s going to create problems down the line. As originally stated it’s a ‘near perfect’ fit. But it isn’t perfect. Specifically the spring bars on the 1861 case are a little too far for the endlinks so the endlinks have a little back and forth play. The contact point seems to be mostly just the bottom of the case and that’s livable to me.

The bigger issue I see is the outside portions of the lugs extending past the bracelet seem to be more than just a visual mismatch and verging into metal on metal wear over a longer period of time. The endlinks also have a small amount of lateral play which allows the outside of the bracelet to rub against the inside of the lugs.

Correctly or incorrectly, this wear pattern made me concerned about the longterm health of the case and I’m thinking removing the bracelet as much as it hurts, is for the best,

I dunno perhaps I’m overreacting and this steel on steel contact would just result in marking, but my gut says differently. YMMV, just wanted to add to the perspective as this is about a 750 dollar decision should you elect to buy the bracelet.
I think you are overreacting. The tiny movement of the solid end links is not likely to cause any real world issues, at least for many, many years. I have a 3861 bracelet on an 1861 case and I have zero movement perpendicular to the case and no rotational movement of the end links, they are tight. And I can't detect any real lateral play back and forth between the lugs. Your movement is due to tolerances from one unit to the next. I'm not sure I understand what your concern is on the lugs extending past the bracelet. Before solid end links there would often be some sloppiness in the way a bracelet interacted with the case and lugs and that could cause damage long term. Those days are mostly gone now.
 
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Totally fair and cosmetic wear to inconspicuous places isn’t a concern at all to me.

What I’m talking about to be more precise is that the first link that begins beyond the end link is designed to give a bit of lateral free-play for fit. At least on mine there’s metal to metal contact on the side of the bracelet to the lugs. That’s primarily what my concern was/is, it’s already pretty marked after one year of use for my watch.

To be clear a little bit of marking in an inconspicuous place isn’t a big deal at all to me. My primary concern is what that contact will do years down the line to the case.

Edit: to mark photo for clarity
Edited:
 
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^^^ I just don't think it is an issue worth worrying about.

In your case are you using a 1.8 mm springbar and not a 1.5 mm bar? A smaller bar could enable the wiggling you are experiencing.
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^^^ I just don't think it is an issue worth worrying about.

In your case are you using a 1.8 mm springbar and not a 1.5 mm bar? A smaller bar could enable the wiggling you are experiencing.

Thats certainly possible, I’m using the OEM spring bars that came with the new bracelet. It honestly seems like the designed lateral play from the first centerlink causes the issue that bothers me more than a very minimal amount of lateral flee play in the end links.

Does the side of your bracelet not contact the lugs? I can already see a wear pattern beginning on mine, granted it is slight over a year of wear.
 
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Thats certainly possible, I’m using the OEM spring bars that came with the new bracelet. It honestly seems like the designed lateral play from the first centerlink causes the issue that bothers me more than a very minimal amount of lateral flee play in the end links.

Does the side of your bracelet not contact the lugs? I can already see a wear pattern beginning on mine, granted it is slight over a year of wear.
No, I'm not having any contact. To really assess your situation we would need to see some pics.

I would hope that the dealer provided you with correct Omega 068ST2207 springbars which are 1.8mm diameter, but you never know. All I know is I have zero play in the solid end links when attached to a late 2019 Speedmaster, using the springbars that came on the 3861 donor watch.
 
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No, I'm not having any contact. To really assess your situation we would need to see some pics.

I would hope that the dealer provided you with correct Omega 068ST2207 springbars which are 1.8mm diameter, but you never know. All I know is I have zero play in the solid end links when attached to a late 2019 Speedmaster, using the springbars that came on the 3861 donor watch.


Random question. Are special spring bars needed if I was fitting the 1861 bracelet to a 3861?