According to Ymap there are 5 results of which 2 are derived
http://ymap.ftdna.com/cgi-bin/gb2/gbrowse_details/hs_chrY?ref=ChrY;start=22821320;end=22821320;name=Z260;class=Sequencefour of these are via WTY and a plus result from a DF21 kit.
I would say that a test from one DF63 kit would be very helpful, after that probably tests for L21** and P312** are going to be the order of the day.