As you most likely know all these were called pistol rounds to hide their actual end use from the then enemy.
In HWS 1 Revised pg. 62, boxes of the “standard” variants are called “Model of 1918”.
In June 1919, due to lack of killing power experiments were attempted to correct this flaw. bullet weight, bullet seating (giving longer OAL) plus case construction and length were tried. So exactly which of these variations the price list considered to be the “long case” or “long OAL” I don’t know.
However HWS gives an “F A 20” example acase length of .931 while the early “REM-UMC 9M/M BS” case length is .777, but some FA cases (only 250) were made with an 0.95" length.
You have to realize the price list was generated a long time ago and are not as specific as they could be.