2892-A2 movement

[vlydog]

Hello,

Can any one tell me if a 2892 movement will fit inside the case of the Omega Sea-master Professional 2531.8000 without modification?

From what I have researched it is approx. 1mm taller than the 2824.

Thank you

[stilty]

2892-A2 is thinner than the 2824-2. (0.30mm thinner on the dial side if measuring center stem to top of mainplate)

You would need a spacer between the dial and movement in order to align the stem. Also, you would need to replace the date disc. The 2824-2 and 2892-A2 discs sit flush in the mainplate. So if you use a 2892-A2, the date disc would be 0.30mm away from the date window and look funny. You would need to find a 2834-2 disc as that disc sits up in the movement. (0.20mm taller than the flat disc in a 2824-2/2892-A2)

Also, the 2892-A2 is slightly larger in diameter than the 2824-2. (0.02mm) So depending on how tight the movement holder is, it may not fit with the existing holder.

Good news is, the dial feet are in the same location. But bad news is, you may have to swap the CP, HW in order to compensate for the 0.30mm spacer. You would probably only have to go up one hand fitting height to H.2.

[vlydog]

Thank you stilty for your detailed and comprehensive response. It sounds like it will be much easier to find an ETA 2824. Although I do like a good hunt, this one may be out of my reach.

[teddy boy]

I am by no means an expert. However, I was under the impression that the 2531.80 uses an omega 1120 movement. The omega 1120 is built on the 2892 ebauche.

[vmena]

I am by no means an expert. However, I was under the impression that the 2531.80 uses an omega 1120 movement. The omega 1120 is built on the 2892 ebauche.

Yes... 1120 mov is 90% an ETA 2892/A2 with new rotor, +2 jewels, some paint, rhodium plating, etc. Unless I'm mistaken, stem must fit 100% if the rep case is like the gen, which probably not.

[marrickvilleboy]

yeah, the biggest issue here is the lining of the stem with the crown tube and crown itself. I remember the movement in this watch is an Asian ETA 2836, which unfortunately, is a little thicker than the 2824 and 2892. You may run into this problem.

[highoeyazmuhudee]

i too have wondered what would fit a 2892 inside it without any inherent problems.

[cskent69]

2892-A2 is thinner than the 2824-2. (0.30mm thinner on the dial side if measuring center stem to top of mainplate)

You would need a spacer between the dial and movement in order to align the stem. Also, you would need to replace the date disc. The 2824-2 and 2892-A2 discs sit flush in the mainplate. So if you use a 2892-A2, the date disc would be 0.30mm away from the date window and look funny. You would need to find a 2834-2 disc as that disc sits up in the movement. (0.20mm taller than the flat disc in a 2824-2/2892-A2)

Also, the 2892-A2 is slightly larger in diameter than the 2824-2. (0.02mm) So depending on how tight the movement holder is, it may not fit with the existing holder.

Good news is, the dial feet are in the same location. But bad news is, you may have to swap the CP, HW in order to compensate for the 0.30mm spacer. You would probably only have to go up one hand fitting height to H.2.

Damn - that is good info.

Wow

[marrickvilleboy]

Damn - that is good info.

Wow

If you use a spacer between dial and movement, you will risk not being able to set the hands on the pinion properly. However, if you use a spacer between dial and case, like i did in my quartz SMP franken, then its not too bad.

Hope this helps.

[stilty]

If you use a spacer between dial and movement, you will risk not being able to set the hands on the pinion properly. However, if you use a spacer between dial and case, like i did in my quartz SMP franken, then its not too bad.

Hope this helps.

Yes, definitely the easier option so you don't have to worry about swapping parts! And it is only 0.30mm, so you wouldn't really notice it.