I usually clean my Omega Speedmaster Pro with a toothbrush and soap then rinse it under luke warm water.  If the gaskets were weak and water/moisture got in would it always produce visible condensation under the crystal?  Or could water/moisture get in and not show any visible signs, thus the owner not knowing until costly damaged occurred of years of use.  My Speedy Pro is a cal 861 around 1990, 1991.  A watchmaker looked at it and said the movement was pristine and the gaskets looked good.  I am not sure what the water resistance for that year of Speedmaster Pro is, if it is 30m or 50m.  Any insight would be great.

Hi Matt,

There's no guarantee that the condensation would show up on it's own, but if you warm the watch with a hairdryer and then place a drop of cold water on the crystal, any moisture inside will condense on the insde of the crystal under the drop.  You have to get the watch pretty warm (not so warm that you can't still hold it in your hand), but this test is very effective.

I believe all recent/modern standard Speedmasters have a water resistance rating of 50 meters.

_john

I also sent you a pm regarding the topic, sorry that I forgot to read my pm sooner.  Always appreciate your insight.  I am sure I speak for many on this forum  .

As to my knowledge, soup can demage the gaskets of the watch. So is that good idea to use the soup while cleaning the case of the watch?

^{To the best of my memory Omega's cleaning instructions on their webpage says to clean it with a tooth brush and soapy water.} 

No message body