Omega Speedmaster Bracelet Compatibility: Apollo 11 Clasp vs '57 Style - Fitting question

Owlsu

Hi, wondering if anyone can help - I've purchased a Speedmaster 57 bracelet to put on my 1861 model, which has a clasp that looks like this

but want to know if I can buy just the clasp from an Apollo 11 bracelet and put it on in place of the current clasp? The Apollo 11 one looks like this

The reasoning for me doing this, after extensive research is that the A11 bracelet won't fit onto a normal Speedmaster because of the notches on the end links so you have 3 options - 1. Dremel off the notches, 2. Use 1.5mm springbars which I don't want to do due to security and 3. Use aftermarket end links but I'd prefer keep it all original Omega.

The 57 bracelet does fit a regular Speedmaster like a 1861 with normal 1.8mm bars and the genuine end links.

So my method will allow a good secure fit and such but let me use the A11 style clasp with the pin tool adjustment and vintage logo if it works.

Any help would be appreciated thanks.

I saw one website where a guy said he did what I'm asking but he also owned both full bracelets so I don't know if there's some sort of requirement to swap claps and clasp connecting links together which he was able to do.

I've only really ever seen anyone ask this question the other way around, where they want the 57 clasp on an A11 bracelet which needs the clasp and (2?) connecting clasp links which you can't even buy separately from Omega so it basically requires owning both bracelets to do it.

ErichPryde

I haven't personally attempted to swap these clasps, but my understanding is that you need the last link that connects the bracelet to the clasp, and the part is no longer orderable separately from the bracelet.

If you do decide to go down this road, please let us know how it turns out. Always good to have additional part information on Omegaforums.

Owlsu

The 57 bracelet does fit a regular Speedmaster like a 1861 with normal 1.8mm bars and the genuine end links.

So my method will allow a good secure fit and such but let me use the A11 style clasp with the pin tool adjustment and vintage logo if it works.

s2000_driver

This is correct. The last link that connects the clasp to the bracelet is different. It is because the "arm" width is different between the two. I tried to capture this in my pictures. I wanted to fit the adjustable clasp to the Apollo 11 bracelet. So I shaved down the arm to fit.

s2000_driver

Can you please post pictures of the 57 bracelet fitment on the 1861? Is it completely flush?

ErichPryde

Well, this is great to know! How much did you have to shave it down? I've already filed my end links and definitely don't have any hesitation to attempt to modification to a 57 clasp arm.

Owlsu

Hi, wondering if anyone can help - I've purchased a Speedmaster 57 bracelet to put on my 1861 model, which has a clasp that looks like this

but want to know if I can buy just the clasp from an Apollo 11 bracelet and put it on in place of the current clasp? The Apollo 11 one looks like this

The reasoning for me doing this, after extensive research is that the A11 bracelet won't fit onto a normal Speedmaster because of the notches on the end links so you have 3 options - 1. Dremel off the notches, 2. Use 1.5mm springbars which I don't want to do due to security and 3. Use aftermarket end links but I'd prefer keep it all original Omega.

The 57 bracelet does fit a regular Speedmaster like a 1861 with normal 1.8mm bars and the genuine end links.

So my method will allow a good secure fit and such but let me use the A11 style clasp with the pin tool adjustment and vintage logo if it works.

Any help would be appreciated thanks.

I saw one website where a guy said he did what I'm asking but he also owned both full bracelets so I don't know if there's some sort of requirement to swap claps and clasp connecting links together which he was able to do.

I've only really ever seen anyone ask this question the other way around, where they want the 57 clasp on an A11 bracelet which needs the clasp and (2?) connecting clasp links which you can't even buy separately from Omega so it basically requires owning both bracelets to do it.

O OmegaBHR

Are you sure the A11 bracelet will not fit the 1861 case? I have a 50th Ann Speedy which from my understanding uses the 1861 case and I was able to fit the A11 bracelet no problems.