This was my Grandfather's, who passed it to my mother, who then passed it to me when I started collecting coins as a child - so it has probably been in my family for the best part of 70 years (at least). I wouldn't get too worried about the colour, I have had real trouble taking the pictures and I think the lustre is a combination of me trying to take a picture with a camera that was bought because it was very good for scenery (and conversely, as a result, bad at close-ups) and my lack of experience in taking pictures of coins (for instance, the coin was almost touching the lens when I took the picture). I would put the odds of it being genuine at 95%+. What do you think it would be worth if it is real? Thanks again for your help.