Graham Phantom 44 tonearm

How can you tell the difference between an older Graham Phantom 44 that does not have the upgraded bearing and azimuth magnet and a new one. Does the older version have a cone shaped magnet or a flat magnet ?
The older one has cone shaped magnets.I am not sure about the newer bearing,but I just got a Phantom,and "think" the new bearing may be a bit sharper at the tip.My friend has the older bearing,which shifts a bit,but still sounds great.
Thanks Sirspeedy, That is what i gathered from the picture in Stereophile , the review was done in 05 and it has the cone magnet and the one i am looking at buying has the flat magnet and was built in 06 so i think it has the new bearing upgrade and magnet upgrade.