154-0699-00
The Tektronix 154-0699-xx (P/N 154-0699-00, 154-0699-50) is a directly-heated CRT for miniature scopes. Standard phosphor is P31. The (non-illuminated internal) graticule has 6 × 10 divisions of 0.203" (5.16 mm) each.
Typical acceleration is -1 kV at the cathode, no post-acceleration.