This is the closest thing that you will most likely find to a Voit B4 mask used by Mike Nelson of Sea Hunt!  This particular mask is in great shape and I have dived with it.  It has the very high volume just like the B4.  The mask rubber is not perished and the mask is good but starting to show some signs of cracking.  The buckles need a cleaning.

Price $80.00 plus 7.00 shipping