Keep the crown unscrewed and place it under a hot light, this will heat the case up causing all moisture to evaporate. Also placing it in a bowl of RAW UNCOOKED rice to absorb any moving liquid. Watchmaker has done this with many many clients suffering from water damage. Hope this works! As others have stated, get it to a Omega trained, Co-axial certified, watch maker asap for his professional assessment.
Best,
Thomas
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