tesla Nixie tubes made by Tesla of the former Czechoslovakia ZM1040 The ZM1040 was made by many manufacturers, with slight differences in internal construction between them. This one was made by Tesla. ZM1042 This model was made by several manufacturers, each with slightly different internal construction. This is the un-coated version of the ZM1040. ZM1080T The ZM1080T is a medium sized nixie tube made by Tesla in the former Czechoslovakia
