If you buy it strongly consider getting the movement broken down and fully cleaned. Not much you can do about the oils from the fingertips that got on the dial; that often leads to discoloration.
Can't tell what the text is either. Can you ask the seller to move the hands? I am guessing it could be the mark of a jewelry store/ retail store. Frankly I would not worry about asking as I would not want to buy from that seller. If they handled the movement and dial with their fingers who knows what else they have done that is hazardous to the watch.