If it's a crack, I would definitely get it sorted as it could allow moisture in.
Out of interest, you don't have to keep the date magnifier if you prefer it without. If yours is a 166.020 (it may be a 166.0020 as Omega sometimes add zeros to the reference), then Cousins list these two. With the L means it has the date magnifier. I prefer mine without as it looks cleaner to me. Just realised the no magnifier crystal is half the price - perhaps I'm naturally a cheapskate...
As well as Phillip's, here is mine before/after.
https://omegaforums.net/threads/what-a-difference-a-crystal-makes.24994/
View attachment 128560
I see from another thread that the bug has bitten hard and you are already on the lookout for another watch
I don't know how long that goes on for - a couple of years already for me
Cheers, Chris
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