Unknown (fine grid)

15mm numeric tube manufactured by Unknown

This is a inverted mystery tube that has no part number or manufacturer printed on. It has a very fine anode grid and looks beautiful. From the look it could be a Mullard or a japanese manufacturer
Brand / Manfacturer Unknown
Same Types
Likely Tyes
Symbol height in mm 15
Characters / Symbols 0-9
Decimal point none
Base / Socket 0
Starting Voltage (typ) tested at 170V, 10kOhm V
Maintaining Voltage (typ) 0 V
Current per Segment 0mA
Reccomend Resistor 0