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I see no reason why you shouldn't wear it if you would like to do so. You will need to have it serviced, with a new crystal obviously. And you should treat it fairly gently and avoid moisture.
Based on the other post he has, he already replaced the crystal about 10 months ago: https://omegaforums.net/threads/1935-28-9-chro-t1.181790/
So IDK why it went backwards...