IMO....... patina is a consistant discolor of the entire dial and its components, not far off from the original color, and the consitant patina will evenly match a bezel and hands if a bezel is present (all lume has changed to another color). Most patina is of age hence a goldening or yellowing as age suggests,,,(an antique look) and in most cases a watch with great patina will have a clean near new looking movement.///////////// Moisture damage is a dark moldy look on the dial and its components, a spotty dark brown,green,black.....and the movement when looked at will show it's rusting or has a spotted oxidation, or the movement has been frankined to repair the water damage....etc.////// Again......may others ring in to clarify and I hope this helps.
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