Crowley's Greek Qabalah - The Eye

The first is the old Semetic letter F (vau) which was called di-gamma (two-gammas) by the Greeks because it looked like two superimposed capital Gammas ( ) of different sizes. Since the isospephia value of Gamma is "3" it made logical sense that the value of "two Gammas" (3+3) or (3x2) should be "6." ................
................