McKeown's lists only two Edelweiss cameras.
- one by ZKM (ЗКМ, Bulgaria), 4.5x6cm 1958-1959;
- and another by Ise (Germany) Deluxe version, folding camera, 6.5x9cm.
Considering you are asking about 9x12cm, there is no such camera in the McKeown's... It could be the regular version of Edelweiss Deluxe... Or just other rebadged camera.