Numeric Tubes Numeric tubes ZM1080T The ZM1080T is a medium sized nixie tube made by Tesla in the former Czechoslovakia ZM1174 The ZM1174 is a version of the ZM1175 with a red tinted coating to improve contrast ZM1175 The ZM1175 is a medium size Nixie tube made by Mullard of England. It is distinctive for its a node grid being made of horizontal wires. « ‹ of 3 › »