Originally Posted by Manton
88 could also be a reference to the fabled German artillery piece.
I thought this for a long time, but:
Eighty-eight is used as code among Neo-Nazis to identify each other. H is the 8th letter of the alphabet, so 88 is taken to stand for HH which in turn means Heil Hitler. For example, the number is used in the song "88 rock'n'roll band" by the neo-Nazi group Landser. The late convicted Order terrorist David Lane wrote "Fourteen Words" and 88 Precepts, and the numbers are often found in combination (1488, 14/88, etc.). This form of the number has inspired the naming of the groups Column 88, Unit 88, and White Legion 88.