Why 'an obvious fake'?
Perhaps Tarnished and Safeware will do us all the honour of sharing their views on what the 'fake mistakes' are?
It doesn't appear to me to be a fake, and frankly, the only way to prove that it is would be to examine a much higher-resolution copy of it.
As far as what there is to go by, the lighting is consistent across the image, there are no digital artifacts that would point to electronic manipulation, and the reflections all match-up.
Looks good to me.