Repairs To Eta 2094 Your Assistance Please

[welderwasone]

Hello, I have purchased a non running Bvlgari Chronograph with ETA 2094 Automatic movement.

The ETA 2094 is super small (10 1/2)  so nothing can be used as a replacement, the movement is made of an ETA 2004-1 with a chronograph module attached between the dial and the 2004-1.

Mine has damage to the ETA  2004-1 but everything else is perfect, So why can't I simply buy a 2004-1 and sit the chronograph module on it?? Of course I can change the rotor for the Bvlagari one and it should be all good???  However, A Swiss movement supplier says that they don't think I could do that?? WHY??

Just to fill in on why I want a replacement movement; 

The watch had the crown caught in something by the last owner, they had pulled so violently it tore the stem out and bent the plate and bridge. I bought a replacement stem from whome I thought was reputable and being stupid pushed it into the movement over enthusiastically and this did further damage as the stem I had bought was far from correct for this movement.

Any suggestions or advise would be great thanks. 

 

[anilv]

No experience with this model but it sounds similar to the Omega 3220 which is based on the ETA 289* family.

Note, the fact that it is based on an existing movement means that it has been adapted from one, it is not identical. The mainplate will be different... There will be screws holding down the chrono module which needs holes in the plate. The hour wheels, center pinion, canon pinion will be taller to accommodate the extra thickness of the chrono module. There will be some wheels which have longer pivots to accommodate an extra pinion to transfer the power from the basic movement to the chrono module, the mainspring is different, probably thicker as more power is needed compared to the non chrono base.

Unless you can lay hold of another donor chrono... Your best bet would be to try to straighten the main plate and go from there..comparing any parts you would need to swap out. Stuff like keyless works, escapement and auto winding stuff should be OK.

Anil

[welderwasone]

Thanks for that Anilv, good advice. My problem being that in pushing through the new stem- that was supplied incorrectly- I have damaged the main plate where it holds the tapered end of the stem. I had to strip the movement and grind a burr off that was jamming the movement, the burr was infact the part of the mainplate that holds the end of the stem in place. I have never had to check a stem supplied to me before to see if it fits, we live and learn but it is going to cost me, I just want to get out of this mess as cost effectively as possible. I made a new stem from scratch that fits properly it winds the movement but will not allow time changes as it must be a tight fit on the inside end of the stem in order to engage.

Bending the plate will give me a better fit but it is something I have never done and invokes images of jewels popping out and all sorts of terrors. 

[anilv]

Are you talking about the hole where the tip of the stem goes?

 

The hole must be really ripped apart!!, .. Since you made a stem from scratch it could have been easy to make one with a slightly oversized tip if it was merely distorted. A proper repair would be to drill the hole out a bit and insert a bush but this would be tricky on a small watch as there not be much metal to work around and as the drill bit would need to go through the stem hole at the edge it may be a non-starter.

 

 

I would think that a donor (chrono) movement would be your best bet.

 

 

Anil

[welderwasone]

You heard the joke about the school boy with the cracker and the frog? yes it really ripped it- but in my defense it is only a little bridge about 1mm wide and 1/2 mm thick part of the mainplate that broke, not a very robust design at all.

I do hope to fix this watch as it is a beauty with full diamond  mother of pearl dial. I have not seen anyone on the net anywhere that sells the ETA 2094, it is unique and not at all related to the ETA 289- series. Sinn, Bvlagari, Omega, Paul Picot and Dubey & Schaldenbrand all use the movement along with several others.  

[anilv]

Best bet would be to keep an eye out on eb@y!

 

All the best!

 

Anil