Well done on getting a mint lens ... the one I purchased looked to be in new condition as well.
Hardly a mark on it really.
It is a very nice lens indeed ... I have played with it bit ... but need to get out with it more though. Colour rendition and contrast are great.
Since my 85mm f/1.9 and 135mm f/3.5 came in though ... I have been playing with them more.