Speedmaster 60th waterproofness

Post old wives tales and expect to be challenged. Sniping has nothing to do with it.

@Bulldozer please just read the whole first post of the link I posted and come back and give us your thoughts on the post.

As I said, if that is your belief, then do the math and show us how it is true.


As a watchmaker who deals with these sorts of things daily, the first question I would ask is how old is that watch? When was the last pressure test done? When were the seals replaced last?

Coincidence Causation

What you see with your own eyes is not necessarily the whole story. Seals work, right up until they don't anymore, which is why at the bottom of that chart I posted Omega recommends getting your watch pressure tested at least once per year to ensure that the seals are in good shape.


A perfectly valid approach if that is your preference - there's no need to justify your preferences by asserting things that are not true from a technical standpoint. I come here to help people better understand their watches, and unfortunately many people on watch forums continue to spout "alternative facts" about them that are simply not true. I have no problems with anyone wishing to debate a subject with a well reasoned argument, but so far you have not come close to meeting that standard. It's not sniping, just trying to prevent people from spreading more false information.

Cheers, Al

Once again, read the Omega chart. Omega clearly says the watch is fine for swimming.

Here are some photos to show the basic construction of the pushers - note that this is for a regular Speedy Pro and others may differ slightly.

The pushers are made of several parts:

1 - The pusher tube or body
2 - The pusher cap
3 - The pusher screw
4 - The spring
5 - The seal
6 - The titanium washer

Here I'm about to change a set of pushers, and I start by unscrewing the pusher screw from the inside of the case:



The caps are then removed, and the spring can be taken out of the pusher body (red arrow):



The pusher tubes are then unscrewed from the case, using the appropriate tools:



This is a photo of the pusher cap on the left, and the pusher tube on the right. The seal has deteriorated on this one, but would be on the inside of the pusher tube, and the post that the pusher screw threads into to hold the cap on is what contacts the seal. So at the red arrow you can see some residue of the deteriorated seal on that post, as that outside diameter of the post is what goes into the inside diameter of the seal, and seals the pusher:



Pushing the pusher under water does not make the seal lose contact with the post or anything - again as I've stated the concern here is that water that may get under the pusher cap could be forced inside the case. Water is not compressible so if it's trapped under the pusher cap and the pusher is depressed, it can possibly force the water past the seal.

Note that Omega's diving chronographs that have pushers that can be used under water are constructed quite differently. This does not show the pusher tube that screws into the case, but these are the parts that have been removed to replace both seals:



So left to right:

1 - Pusher cap with the post built in
2 - Spring
3 - Washer
4 - Seal #1
5 - Spacer
6 - Seal #2
7 - Clip - this is what holds all these parts into the case via the small groove in the post on the pusher.

Here is what the stack looks like ready to be installed in the case:



In this case there are 2 seals instead of just 1, and the tolerances/fit is a fair bit tighter on everything with this style of case. This particular watch is rated to 300 m.

Hope this helps.

Cheers, Al