15.5mm numeric tube manufactured by RFT / WF

The Z560M is a red coated numerical nixie tube manufactured by WF/RFT. I has a dome top, that makes the digits look a bit magnified and give the tube an unique look, the coating covers only the top, most likely for cost saving production.
Brand/ManfacturerRFT / WF
Same Types
Likely Tyes
Symbol height (mm)15.5
Decimal pointnone
Starting Voltage (typ)170 V
Maintaining Voltage (typ)135 V
Current per Segment1.75mA
Reccomend Resistor20kOhm = 1.75mA