The Z560M is a red coated digital tube. It has a domed top that makes the numbers look a little bigger and gives the tube a unique look, the coating only covers the top.

The height of the symbol in mm is 15.5

Symbols  0-9

There is no decimal point

Base / Socket B13B

Initial voltage (typ.) 170 V

Support voltage (typ.) 135 V

Current per segment 1.75 mA

A recommended resistor is 20 kΩ = 1.75 mA