15.5mm special tube manufactured by RFT / WF

The Z562M3 is a special nixie tube manufactured by WF / RFT. It can display two arrows. It was used in elevators to indicate "going up" and "going down", but it also could be used for indicate left and right. There is also another tube, the Z562M2, that was used in elevators, it can display 1-8,E,K for indication of floors. A Z562M1 also exists, but this was not made for elevators, it can display X,Y,Z,R symbols for coordinates. This tube is very rare, i believe not many of them were made at all.
Brand / Manfacturer RFT / WF
Same Types
Likely Tyes
Symbol height in mm 15.5
Characters / Symbols two arrows
Decimal point none
Base / Socket B13B
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 135 V
Current per Segment 2mA
Reccomend Resistor 17kOhm