GSOTM, how is the case back fitted?

Very new watches so not that many opened by owners yet.
Do know there is a special way to putting them back on from forum chat over time. ( not something that should be done without a fair bit of research or the correct tool as damage can result and the case is not cheap at $7k IIRC )

It's not Viton....Omega specs describe it as follows:

MATERIAL : GREEN OR RED POLYUR

Hard plastic seal that is common with this type of case back - similar seal below on a Speedmaster auto:



Seals are one time use only as they deform when the back is pressed in place, and will never seal as tightly once the case back is removed. The case back is removed by using a case knife per Omega procedures.

Cheers, Al

I probably have that article, as I have subscribed for many years, but the last thing I want to do at the end of my day is read more about watches.

Anyway, no idea what the technical competence of the person who did the review is, but usually they are weak in these magazines, so if you get beyond the basics I would take what they say with a grain of salt. Viton seals (O-rings) are used by a few brands, like Sinn in their U1 model for example:



Note that Viton is a trade name for a fluoroelastomer made by Dupont. In contrast to the Viton seal shown above, which is soft and pliable much like a Buna-N O-ring, the Omega product is a hard polyurethane. These gaskets seal in very different ways.

Perhaps the author concluded that the green seal in the DSOTM was Viton because they have seen the green Viton seals in the past in watches like the U1...

Cheers, Al