Your friend is very fortunate to have a 1902. I am having a bit of trouble visualizing what you are describing. There is no vertical toggle axle pin in the right dished toggle. There is the toggle latch in the right toggle which engages the corresponding catch on the frame. The operation of an early Luger with a toggle latch differs a bit from the later models. Since the toggle is held down by the latch, it is necessary to pull straight back on the toggles in order to move the receiver far enough for the latch in the toggle to disengage the frame catch, then the toggles will rise in the usual fashion.