IN-1 (No Base)

18mm numeric tube manufactured by Reflector/Sovtek

This tube looks like a IN-1 without the big brown base. This tube was either made for soldering into a board, but its more likely that this is a part of an IN-1. Maybe this part of the tube was manufactured and then assembled into a IN-1 by adding the base. It has no markings or anything else on the glass, but because of its shape it clearly can be identified as "IN-1". There is also a version with a fine grid.
Brand / Manfacturer Reflector/Sovtek
Same Types
Likely Tyes
Symbol height in mm 18
Characters / Symbols 0-9
Decimal point none
Base / Socket 0
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 135 V
Current per Segment 3mA
Reccomend Resistor 12.6kOhm = 2.8mA