We can arrive upon 32 Stag types/positions thanks to the following:
Stamps are to viewed in a readible position and turned around its vertical axis to find the wire-marking at the gummed side.
The IVb denotes the wire-marking type and position.
The -L, since viewed from the wire side, implies a dandy roll with Stag facing right and vice versa for -R.
The -left, also view form the wire side, implies that the Stag is running left, irrespectively of watermark type [face left/right].
For quick recognition purposes the eight positions - just relative to the stamp face, no reference to how the paper was gummed or fed into the printing press - as viewed from the printed side, will be given as:
a - d     a =  stag facing left
         b, c, d stepwise turning 90 degrees clockwise
e - h     e =  stag facing right
         f, g, h stepwise turning 90 degrees clockwise
               a             b         c            d
               e             f         g            h