3891m. Cross the bergschrund on the right (quite steep) to the left of a serac and make a rising traverse left to follow the couloir which leads all the way to the summit. 50-55 degrees.
Route is number 13 in the topo at this link:
J Biju-Duval, G Sourice, J Traynard 06/Jul/1971
Not a classic by any means but worthwhile little route for a short day, particularly if your friends are on the normal route! Quite a bit of grey ice in October in which case prob safer grading it D. HamishD - Solo O/S - Oct/09