Unknown (B-40225-AL)

7.8mm symbol tube manufactured by Burroughs

This is a unknown miniature nixie tube manufactured by Burroughs. It can display the letters A to E as well as the plus and minus sign. If you have any information about this tube, i would be happy to hear about it UPDATE 11/JAN/2020: I got a message an the information that this is a type B-40225-AL.
Brand / Manfacturer Burroughs
Same Types
Likely Tyes
Symbol height in mm 7.8
Characters / Symbols A,B,C,D,E,+,-
Decimal point none
Base / Socket SK-116
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 0 V
Current per Segment 0mA
Reccomend Resistor Tested at 10kOhm