On Friday, July 19, 2013 3:01:00 PM UTC-7, wrote:
Cant be 100 % sure but that does not look like a Discus 2a wing tip.

Rolf

There are 3 generations of wingtips on the Discus 2
-no winglets (upturned wingtips)
-Masak winglets
-Maughmer winglets

Those look like the Maughmer winglets.
Craig R. / D2b driver