This is the fast f5.6 super angulon lens - not just easier to view and focus with than the f8 version but it has 5 degrees extra coverage at 105 degrees.  This is the later Multicoated version too.

NB: Lens Panels for most 4x5 cameras are available for $40 to $70 extra - just ask.

Schneider 75/5.6 wide angle lens