Where have we seen that Cross before?

Regarding the "new" papal Cross which has been used at this morning's Palm Sunday Mass by pope Benedict, I thought it might be interesting to share this image of an occasion at which it has been used before:

Here is Bl. pope John XXIII using it for a celebration in the Byzantine rite during the II Vatican Council (so, we might call it a conciliar Cross):

(click to enlarge)