Help with Crystal Replacement

[Doawah]

I'm having some issues when trying to replace the crystal on an Omega Seamaster f300 Electronic I recently aquired.  Can someone give me a little insight on how to best approach this.  I have both a press and a Bergeon crystal tool (which doesn't seem to work with this crystal) but I can't seem to remove it.  I don't believe the Bergeon tool will work on this type of crystal as it appears to be glass or crystal based.  I've attached a few pictures in the hope that someone will have an idea or provide me with a direction on how to best tackle this.  I suspect it's just a matter of pressing it out and pressing a new one back in.  The case number is 198.001.

Thank you so much in advance for any help.

Graham.

[Kalanag]

It looks as if there was a bezel which has to be removed. The crystal is most likely from plastic with a reinforcement ring inside which is typical for water tight watches.

Edited July 22, 2022 by Kalanag

[Paul80]

It does look like something is missing ? Do you have the bezel?

The crystal should just push out with the aid of a crystal press or finger pressure if you are strong enough

If it is glass or it does have metal tension ring around it's circumference a crystal lift will not work and may do damage

[Kalanag]

38 minutes ago, Paul80 said:

It does look like something is missing ? Do you have the bezel?

The watch looks original. There is a slim bezel. Here pictures from another website:

 

Edited July 22, 2022 by Kalanag

[JohnR725]

Could we get a picture of the inside of the back so I can see the case numbers. With the numbers if I'm lucky I can look up and find out what the crystal supposed to be and if were really lucky we might get a drawing of the case but usually not on the older stuff but still might have a case parts list perhaps.

[Kalanag]

That‘s the back of the same Omega model found in the web:

Edited July 22, 2022 by Kalanag

[Doawah]

That is the case number.  I put it in my original posting but am glad Kalanag confirmed it.  Also, I do know that this model did not have a bezel.  I'm going to try and use my press to get it out.  According to the Otto-Frei site the crystal I need is an OME-CRY-063PX5233 or a CRY-2577 depending on the color of the tension ring inside.

On another note real quick.  The Omega tech sheet says to not uncase the movement without removing the oscilator first.  Will removing the oscilator require the watch to be re-calibrated?

[JohnR725]

5 hours ago, Doawah said:

Will removing the oscilator require the watch to be re-calibrated?

No they're meant to come apart  there won't be any recalibration. I assume you've read the entire manual and paid attention to all the things you're not supposed to do?

[Doawah]

I did.  It says NOT to uncase it unless you remove the oscilator first.  I'll bet it has been removed in the past without having this done.  

[JohnR725]

7 hours ago, Kalanag said:

That‘s the back of the same Omega model found in the web

It's good that you found it on your website the website I checked sucked it doesn't listed at all. Couldn't even look up the crystal number which I found was weird

[Doawah]

Update.  I got it out.  I guess I was just being nervous and not being agreesive enough.  It pushed right out with my thumbs.