Hi Doug,Go figure. So then it would mount to, and focus at infinity on, a Hassy 200 series or 500 series, or could be mounted to a Phase One DF+ or Phase One XF via adapter.
For those using a digital back with a sensor-based electronic shutter such as the IQ3 100mp or IQ4 100mp or IQ4 150mp that would seem to be a broadly workable solution on a 500 series. For those using other digital backs they would be limited to the 200 series (for the limited range of backs that work on that) or a Phase One DF+ or Phase One XF since those three have focal plane shutters.
Yes, it seems an odd coincidence that the flange distance is the same as on the V-series bodies given the stated incompatibility, although as someone else here has spectulated, it's possible that a protruding rear element might interfere with the mirror. This might be a non-issue when adapted to a Phase/Mamiya body with the shorter mirror (6x4.5 vs. 6x6)? And at least to my knowledge, there are no V-mount digital backs with electronic shutter.
John