SG D1 6d on 71/2d type 1 is one of the rarities of the Queen Elizabeth reign. This example is fresh and good appearance. It has a diagonal paper crease which can be seen on one of the scans of reverse, but is much harder to see on the other scan of the reverse...
Holding up to the light, I have not been able to see it affect the front of the stamp and I have included two scans to try to show this. It does not detract, but I have priced accordingly.