Omega Constellation It has got dirt on the dial, the glas was broken and the dirt came in from laying in the drawer i think not from water could the dial be fixed, not repainted but washed of in some way? The watch is from 1974 I dont know at this point if sell or keep
I strongly suspect the staining you see is discolouration of the coating on the dial which might very well be under a protective clear coating. If it is as I suspect, it will not "wash off". Sometimes, the less you try to do to a cosmetic problem like that, the better.