Generally there is a means near the crown, that is pressed down and releases the stem. On seikos it's a small indent that you push down on with the tip of a tweezers or the tool used to push out pins on a bracelet. Go here - https://www.google.com/search?q=rem...=X&ved=2ahUKEwijjpOTpZHpAhXXl3IEHbtpBe8Q_AUoAXoECAwQAw&biw=1280&bih=597&dpr=1.5
it's a google search showing images for removing stem

 

There's a couple documents on CousinsUK.com regarding this movement. Search PDFs for "omega 1001"; they will be near the bottom of the results. One's just a parts list but the other has details about the movement. I couldn't find anything regarding removal of the stem but page five on the details doc has a good picture of the movement with face removed and page six shows the arrangement of the keyless.

I suspect you remove the face and perhaps the date wheel and then get to the setting lever and either remove it or flex it out of the stem groove.

I find the description of epilame and cleaning solutions on page seven to be intriguing. I'll be sure to keep the freon away from movement parts in the future.

 

ITs likely a split stem that you wedge out with tweezers or similar by wedging under the crown in out position.

 

Correct - the split stem will need to be popped apart to enable the case to come apart. After popping the split stem apart, it may be necessary to push the male portion of the stem that is still in the movement back in to the winding position, in order to get the movement out of the case.

The stem release "button" on the movement will only come into play if the OP needs to remove the male portion of the stem from the movement. If the crown is being replaced I recommend getting both the male a female parts of the split stem as replacements. The female portion that screws into the crown comes long and is cut to length - often changing the crown (even to the same crown) will require a new stem due to small differences in how far the crown post is tapped, so having a spare on hand is always a good idea. The male portion from the movement should be changed at the same time to ensure a good fit between the male and female parts.

Cheers, Al

 

Here is a picture of the movement.

Just below the stem is a button with a hole in the center.

Press down lightly while lightly pulling on the stem. If the stem doesn't slide out. Press a little more on the button.

Only unfortunate thing to happen is the button sticks and doesn't come back up due to the post being dry

You will need a new crown as mentioned and a new stem

DON

 

Indeed, as dirtvictim above suggested, it must be a split stem that you have to basically yank out.

 

system 11...Hello!

Geez: it seems to me that the 'indented push piece' is there to release the stem! It's been years since I worked on one of these, but I do not recall a split-stem.

So: with the crown pulled out / press the push-piece...I reckon that the stem will come out!

It's really important to pull the stem out first BEFORE you push on the push-piece...otherwise, when putting the stem back, there's a real chance that you'll foul the winding / setting mechanism, which will compel removing the dial...way too much work!

Michael.

 

Archer...Hello!

To my mind & from what I can see here, this really looks like a 1-piece stem, that will come out if the 'button' is pushed.

From what I have heard of these Cal 1010 Omegas ( which a Watchmaker friend has confirmed ) , they DID show up with two, different stems. Which IS pretty strange!

Once again: this is not a one-piece case, and it certainly seems to me that a 2-piece stem would only be used on a case where the movement comes out from the front...am I right?

Michael.

NEW COMMENT!

Okay...I ( finally! ) see what's happening here: the Original Post ( System 11 ) showed a case that takes a 2-piece stem. The Post by Don shows a case with a 1-piece. I was confused by not paying attention...my apologies!

 

If it’s the same case as the OP’s photo then it has to be a split stem and Archer’s description is correct. You can’t access the stem release button until the movement is removed from the caseback and the only way to get the stem through the tube is without the crown.

The idea is that you grab the crown with something (I typically use the pincher style hand removal tool), give it a firm pull, and hope that the two-piece stem separates before something breaks in the keyless works. Then the case comes out and you push the stem release button to remove the remainder of the stem.

 

Thanks for all the replies, I tried pulling on it a bit but I'm really worried about breaking it. Perhaps I should take it to a watchmaker, I was hoping this would be easy! It's just the actual crown which is the problem as it's designed to take a 4.5mm and the one on there is 5mm causing the crown to foul the cutaway in the case and make it hard to turn.

 

These can be tight, so they often require a good bit of force to pop apart - feels like it will break but it's unlikely it will. Just give it a quick sharp pull - farting around with trying to get the split to line up and release usually only works if things are worn...

Cheers, Al

 

Of course there’s always the chance that someone used a one piece stem, managed to get the movement into the caseback, then loctited a crown onto the stem.

 

There is a trick that works occasionally, and with the side of this case being fairly thin I think it could work here. If you turn the watch upside down (bezel removed) while supporting the 9 o'clock side of the dial (wearing finger cots and being extremely careful of the hands) and rotate the crown slowly it's possible the two halves of the stem will slide apart (instead of being forced apart by pulling straight out) just from the weight of the movement. I'm not sure which stem position would work but you could try it in different ways. Make sure you're not holding the watch more than a couple of inches above the bench and that there is a clean soft pad for everything to land on. Sometimes a little bouncing action helps it release.

Or, you could take it somewhere to insure that nothing gets damaged.

 

Well it didn't cost me very much, so I think I can afford to send it to someone reputable. This is my "beater" Consetellation, it's exactly the same as my really nice one, but less nice and cost 1/4 of the price. Ridiculous really thinking about the combined pile of money I've spent on watches and if you told me that on pain of death I had to choose just one and stick with it, it'd be one of these.