The key hangup to concluding that all of the blank toggle 29 DWMs were originally manufactured for export to the Riff Tribe is the apparent inconsistency between August Weiss' reference to a "paar Tausend" which can be understood as either a "few thousand" or a "couple of thousand" and the evidence that approximately 15,000 blank toggle Lugers were produced by DWM/BKIW in the late 1920s. Dwight, some years ago you felt the Riff contract was for 2,500 pistols which is consistent with Weiss' recollection (
http://forum.lugerforum.com/showthread.php?t=4937). Have you found new information?