What is the crystal size and reference number for my watch?

[QuadMachine]

Hello, I have an Omega De Ville Dynamic (men). On the back of the watch it has the "De Ville" carving and also reads "Tool 107". The crystal is cracked and needs replacing. 

Does anyone know what the reference number for the crystal replacement is? Or what diameter should I be looking for?
 

 

 

Edited August 1, 2022 by QuadMachine

[watchweasol]

Hi Before chasing up a crystal check what its made from If its acrylic you may be able to polish out the scratches with something like Polywatch or auto chrome cleaner Sovolautosol and save you a few quid. If its crystal you will need to remove it and measure its size and the case rim. Check to see if it has a gasket  as well.    you will need a crystal press and or a crystal lift tool depending on the material  and also whether its got a tension ring on the glass.

[jdm]

8 minutes ago, QuadMachine said:

Does anyone know what the reference number for the crystal replacement is?

The reference is inside the caseback. Replacing this crystal isn't difficult still some specific tools and knowledge are necessary, so if you have a reputable repair show I would recommend to give them the work. You can still buy the replacement crystal yourself.

[QuadMachine]

8 minutes ago, watchweasol said:

Hi Before chasing up a crystal check what its made from If its acrylic you may be able to polish out the scratches with something like Polywatch or auto chrome cleaner Sovolautosol and save you a few quid. If its crystal you will need to remove it and measure its size and the case rim. Check to see if it has a gasket  as well.    you will need a crystal press and or a crystal lift tool depending on the material  and also whether its got a tension ring on the glass.

I believe it is acrylic but there is a crack which lets in air and dust so needs to be replaced. I just don't know what size/model I need to get

9 minutes ago, jdm said:

The reference is inside the caseback. Replacing this crystal isn't difficult still some specific tools and knowledge are necessary, so if you have a reputable repair show I would recommend to give them the work. You can still buy the replacement crystal yourself.

Do I have to remove the crystal and the movement to get there?

[jdm]

1 minute ago, QuadMachine said:

Do I have to remove the crystal and the movement to get there?

No, it's a screwed caseback with an uncoventional way to hold the strap.

[watchweasol]

https://r.search.yahoo.com/_ylt=AwrIQdf5BOhiXccA2QV3Bwx.;_ylu=Y29sbwMEcG9zAzEEdnRpZAMEc2VjA3Nj/RV=2/RE=1659401594/RO=10/RU=https%3a%2f%2fwww.cousinsuk.com%2fproduct%2facrylic-glasses-by-size%23%3a~%3atext%3dMost%20Popular%20diameters%20used%2cby%20Omega%3A%20%C3%9829.6mm%20%C3%9830.6mm%20%C3%9831.6mm/RK=2/RS=sbr4TJAncHsVxVxJaNPSuaYRmMc-

This is the page from cousins website regarding omega acrylic glasses. As you will appreciate there are many sizes. The normal way is to remove the offending crystal and measure  it across 9 -3 position  then add 0.01 to the size.  You will still need tools to fit the replacement

[markr]

I have one and it is not a screw back it is a front loader the 107 tool is to remove the crystal.  The ring on the back just holds the special band on.  I have a Tissot that is the same.

[MrRoundel]

4 hours ago, jdm said:

No, it's a screwed caseback with an uncoventional way to hold the strap.

I agree that it has quite an unusual strap. I don't think I've seen one with such radical taper.

@QuadMachine, It can be frustrating to try to find the right factory crystal for wrist-watches. If the maker didn't provide a catalog with crystals to match the case number, which not all did apparently, your best bet probably is going for something generic. G&S, Steinkreuz, etc. G&S catalogs do list a lot of their "PA" and "ET" (Ever-tite, which have tension rings)  crystals with watch brands noted. Good luck. I hope you have an easy search and replace job.

[QuadMachine]

Based on the following links, I think my watch should be Ref 166.144 Cal 1012:
 

• https://watchcharts.com/listing/2406918-impeccable-omega-de-ville-dynamic-chocolate-dial-ref-166144-cal-1012
• https://almawatches.com/products/omega-de-ville-dynamic
• https://omegaforums.net/threads/omega-de-ville-dynamic-need-for-help.46806/

 

even with that info, I still can't figure out where to get a replacement acrylic crystal for it

[GleaveandCoLuke]

The crystal you need is PZ5083 if your case is 166.144.  Check the case number on the inside of the caseback.  You might find it hard to locate a genuine glass, we sold out a while back.  We have the generic verion here: https://gleave.london/glass-omega-pz5083-steel-ring-xac-330-552-generic/

Other suppliers will also stock this generic one or you may be able to find a genuine one on ebay.

[JohnR725]

1 hour ago, QuadMachine said:

Based on the following links, I think my watch should be Ref 166.144 Cal 1012

A better way to get your case number would be to take your case back off and see what it is. This way you avoid any unpleasant surprises just in case for some reason it's not the same.