Hi everyone,
I'm so in love with my Moonglow
My grail complication. Perhaps my grail watch. I'd love to find out more about the movement. Can anyone give me any info?

I don't know anything about how you take a base movement and add a module. Is the module very integrated with the base movement or does it sit on top (or underneath)?

I'd love to know more about the JJ04 module.

Do you think CW would have movement design diagrams that are available to me the public?

Can anyone show me what I'm looking at here? I've taken two pics to try and get the rotor out the way. Can anyone draw some red arrows or squiggles to let me know what I'm looking at?

Grateful for any information (or links) no matter how basic

To add - I was just about to moan about the very plain very black rotor until I realised that half the movement is in total darkness and half in the light. I kind of like that

I’m probably completely wrong here but I always believed a module sat on top of the movement, therefore won’t be visible to you through the caseback.

The idea of a module is that it uses the timekeeping and power of the base module and adds some extras to take that power and drive whatever the module is designed to do.

In the context of your moon glow, the extras will be gears to drive the moon round with the base module handling the normal hands and date wheel.

Mostly you are looking at the automatic winding works, crown wheel, balance and other parts that are on the bottom of the movement. The JJ module sits on top.

I only marked the parts I am pretty certain of. Note that the reverser wheels are the parts that stick to create the spinning rotor syndrome when hand winding.

I did find this interview that explains a little more.

Just going to put this link here so I can come back to it and read later - I found a walk through of the assembly of the base ETA 2836 movement


https://www.watchrepairtalk.com/topic/1 ... lkthrough/

@rkovars - thanks!!

The two wheels peaking out from the rotor in the second pic (on the left) are the reduction wheel and ratchet wheel. The ratchet wheel is the bigger of the two. These are part of the automatic winding works.

Is this the JJ04 module, that the 2836 movement would 'sit into' and engage with?

missF wrote: ↑Mon Sep 16, 2024 7:40 pm Is this the JJ04 module, that the 2836 movement would 'sit into' and engage with?


IMG_5809.jpeg

I've been pondering over this image when it came up a while back and still can't figure it out. The JJ module wouldn't have a crown so the movement is below that test jig. It is strange image to put up to showcase the module. I think they would have been better off just putting the module itself on a table.

That is the module. I believe the moonphase disc is friction fitted to the large brass post in the middle, with the hands fitted to the smaller posts poking out at the very top.
The sw200 base movement is fitted underneath, hence the crown at the bottom.
There are 3 fixings on the very top edge of the module for the dial feet.

With the additional images on CWs site, you can almost see it in stages ...

StrappedUp wrote: ↑Mon Sep 16, 2024 8:26 pm That is the module. I believe the moonphase disc is friction fitted to the large brass post in the middle, with the hands fitted to the smaller posts poking out at the very top.
The sw200 base movement is fitted underneath, hence the crown at the bottom.
There are 3 fixings on the very top edge of the module for the dial feet.

With the additional images on CWs site, you can almost see it in stages ...

Thanks for that! It would be interesting to see the back of the moon disk. There is a lot of space between the JJ and where the top dial affixes.

rkovars wrote: ↑Mon Sep 16, 2024 9:43 pm Thanks for that! It would be interesting to see the back of the moon disk. There is a lot of space between the JJ and where the top dial affixes.

Looking at this image from Worn & Wound, there is quite a large gap between the disc and dial.
Also, the disc itself looks to be quite a bit thicker than the dial, which I guess makes sense as it needs a recess to allow the luminous moons to be fitted.
So I reckon both of the above combined accounts for that space underneath the dial.

That looks like a fairly standard ETA2836/SW220 with some extra bits added, in lieu of the date complication.

I'd say that the module itself is not one assembly screwed to the main plate, but a number of individual parts that make up the moon-phase complication.

A good example of an actual 'bolt on', separate module, would be the Omega Speedster 'Reduced' with the Dubois-Depraz chronograph module.

This might be helpful. An article (Snippet) from Autumn 2014 CW Magazine.