The Tektronix T0520 is a CRT used in the 525, 532, 570, and 575.
154-0093-00 is a T0520 with P1 phosphor, aka T0520-1.
T0520 Def plates
T0520 Gun Assy
T0520 CRT from a 575
T0520 CRT from a 575#2