Omega Seamasters are pretty reliable, but when entering water I do a quick check to make sure the screw down crown is tight--this being said, it is worth being careful not to screw down too hard either and be careful not to wear out the threads either. I have several mechanical watches which are divers and several different brands and occassionally I will find the crown needs to be tightened but not quite as often as I would have thought.
The issue you had on the inside of the crystal was odd--I wonder if that was there all along? Perhaps you experienced a small amount of condensation or something like this, moving from a warm and moist environment to a cold one, etc. I am glad your watch turned out to be OK but it was smart to check anyway.
The issue you had on the inside of the crystal was odd--I wonder if that was there all along? Perhaps you experienced a small amount of condensation or something like this, moving from a warm and moist environment to a cold one, etc. I am glad your watch turned out to be OK but it was smart to check anyway.