15.5mm symbol tube manufactured by RFT / WF

The Z561M is a red coated end view nixie tube manufactured by WF / RFT. It can display various symbols related to measurement units. The matching numeric tube is the Z560M.
Brand / Manfacturer RFT / WF
Same Types
Likely Tyes
Symbol height in mm 15.5
Characters / Symbols -,+,Ω,%,V,A,W,sinewave
Decimal point none
Base / Socket B13B
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 135 V
Current per Segment 1.75mA
Reccomend Resistor 20kOhm = 1.75mA