1944 2421-1h

First of all, you are comparing apples and oranges, this particular dial would never have been that hot, more likely it was originally in the range 2-5 µSv/h, based on my experience. But the watch dial has been repainted and and relumed, and the hands relumed, so depending on which type of lume was used, it might be much less radioactive. Only a Geiger counter will tell.

Moreover, under normal conditions, there is virtually no danger in wearing a watch like this, the risk is more associated with people who open and work on the watch. So I feel pretty comfortable saying that your fears are 99% irrational and based on emotion/ignorance. However, fear is fear, and we've seen many times that it is pointless trying to explain reality to people who have an irrational fear of radiation. If the fear is greater than the sentimental value, then you should dispose of it.

However, you need to be aware that the dial was poorly repainted, the "OMEGA AUTOMATIC" looks like it was drawn by a kindergartener with a fine-point sharpie, and the rest of the dial isn't much better. Therefore, it is not going to be a desirable watch for anyone else. You will need to be prepared to sell it for very little, basically the sum of its parts, including zero for the dial. If someone offers to take it off your hands for $200, you should probably grab it.