help on crystal ref

[Kwijibo]

Hi guys

As said on another post I bought this Seamaster for 170 euros which is cool. Unfortunatly no caseback. The ref may be 166.009. Unfortunatly too the wheels bridge is a 565 insted of 562 which is not a big deal as I intend to keep it for the time being. I may have a 562 bridge in a drawer.
I'de like to change the crystal as it's badly scratch and not original. I can't find the reference and size. crystal opening is 29,7 or so. Some help would be appreciated.
As for the caseback I was thinking of puting a see through casback as the movement is rather good looking.
this may give a nice watch after a few changed parts such as the mainspring, crystal and a fancy strap. The dial under this ugly crystal is pristine.

 

[rendo]

Likely a PZ5140 but the only way to confirm without the case back requires taking out the current crystal and measuring it.

https://www.cousinsuk.com/sku/details/omega-case-parts/pz5140

 

[rendo]

Also, I think you are missing the tension ring. Unless you have a mismatching dial, you wouldn't normally see the stem through the crystal like how your photo does.

 

[Archer]

Correct crystal is 063PZ5140.

 

[Kwijibo]

Thanks Rendo and Archer

there's a step. the dimensions I gave was the wider one on the edge of the case. So 29,62 mm sounds good for the narrower diameter. I popped up the bezel to remove all the craps sitting between the midcase and bezel.
Does anyone have tried the generic cousins crystals?

have a nice day.