Re:
i had some of these but in the small flange version. I was forever breaking rear axles at the point of where the block-side cone ends. In the end I got some campag record axles and threaded those cones and locknut onto it. Needless to say, the threading was slightly different, but I forced it on (obviously recutting a thread) and never had another snapped axle.
I see your rear hub is also missing the chrome locknuts.
nice hubs though