Collection of Electronic Components Hitachi CRT Vacuum Tubes, the CRT is for a vintage Oscilloscope machine

A Collection of 6 electronic components including a teal green circuit board marked 300V ZK R30E, a HITACHI 95CB31 cathode ray tube, three small vacuum tubes including one Mullard E91CC, and one OHMITE component (Row 1: 1 Circuit Board, 1 CRT. Row 2: 3 small vacuum tubes, 1 small component. Total count: 6 items).