Haha! Read that as 725,000 Euros (Seven hundred twenty-five thousand.) I forgot the Euro uses commas like the USD uses decimal points. Add to that I thought I saw a third zero, and I was soon checking that number.
Very nice plate! What an item to have. I would do whatever it takes to preserve it. I'd rather have a lacquered original than a blank piece of metal that once had a license plate stamped on it. Though of course leaving it unlacquered is preferred, preserving the image is of great importance.