You are seeing two things here:
1. The pull of metal into the obverse, which produces the 'ghost' of the Queen on the reverse. You can also see 'ghost images' on normally struck coins and split planchet errors.

Check out the split planchet errors here too for some good ghosts:
http://goccf.com/t/3304372. The cap on the hammer (reverse) die is late stage, which means it has been pounded quite thin, and you are also seeing the design transfer of the hammer die through the cap onto your coin. As the cap on the die gets thinner and thinner, more design elements come through.
Example here:
http://goccf.com/t/320547Plus, the die cap can wrinkle and break into fragments, which looks like might be happening to your coin.
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