2846 Set Bridge

[omgiv]

Does anyone know if there is a different set bridge for the ETA 2846 that will give it two stem setting instead of three? The 2846 has winding, date setting, and time setting. I am thinking about using it for a 5513 project and would like just two (winding and time). I think I have seen a picture of someone filing the extra setting out but was wondering if a new part was available. Thanks!!!

[omgiv]

Nevermind. I found it. It is for a 2801-2. I have a 2801 and it is different. Sorry for the clutter.

[Toadtorrent]

Hey omgiv...great to see a post like this get self-service answers. I'm thinking you've got a fair bit to share in terms of knowledge. I see you've been on the forum awhile...feel free to post the progress of your project!!

[stilty]

That is the part to convert to a 2 position stem. looking forward to seeing the project.

I am curious about the case you are using. Is it a gen spec case? Or is it a rep case made for a 2836-2?

Reason I ask, is if it is gen spec, you may have a stem alignment problem with the 2846. Correct me if I'm wrong, but isn't the stem position different between a date and non date 1570? The date module is not installed, therefore making the stem closer to the dial side.

1570 with no date module:

If you are using a gen spec case, and the stem position is different, you would probably want to transplant the 2846 works into a 2801 or 2824 mainplate. This way your stem will align with the case tube. center stem to dial seat is 2.25mm on the 2846, and center stem to dial seat is 1.80mm on the 2824 and 2801.

I could be wrong, so any vintage masters, please chime in.

[ubiquitous]

He's probably okay if he's using a gen spec case.

Generally, movement swap/fit is as follows:

-1520/1570 = 2836/2846/2783/4 swappable

-3135 = 2824 swappable

So, if he's going for an oldie, he should be otay.

[stilty]

Thanks R, That is a definite guide to go by, but what about the non date 1570 models? 5513, etc do not have the date module installed on the movement, correct? or do they have the module, minus the date disc. I've never looked at one in person, but doesn't the dial just sit on top of the mainplate, therefore the stem alignment would be different if the dial was seated on top of the date disc seat? I know someone that installed a 1570 in a 3135 case. He removed the date seat, swapped the CP and HW to shorter height. Rolex offers 2 hand heights for the 1570, so I'm guessing that is why? one set for 1570 with date module, and one set without. Again, never seen one, or worked on a non-date 1570, so I don't know.

[ubiquitous]

Hmmmm... 1520 should be fairly close in fit? That's the non-date movement, though I am not sure how it would compare to a 1570 with the date module removed

Interesting... Very, very interesting...

[omgiv]

I believe that it is an old style MBW case with the Original Polex 5513 between the lugs. I am still waiting on parts to start work but will keep you posted. I haven't thought about the missing date wheel and stem alignment issues but have a 5513 planned as well. I will let you know if I run into any issues. Thanks for the replies!!!!

[ubiquitous]

If you are using an MBW 5513 POLEX (originally fitted with a 2836-2), swapping in the 2846 sans datewheel will be no prob whatsoever. Stem lines right up, no issues.

[omgiv]

Thanks!!! Do you know if the stop lever used in the 2824 and 2836 can be used in the 2846?

[ubiquitous]

Should be the same part for those models.

[omgiv]

Thanks!!! I will try it out tomorrow or later this week.