IV-12 VFD tube is a luminescent 7 segment green glow indicator that displays information in the form of digits 0...9, used in watches and other devices
IV-6 VFD nixie tube is a luminescent seven-segment green glow indicator that displays information in the form of digits 0...9, used in clock and other devices
IV-18 VFD nixie tube is a green fluorescent indicator that displays information in the form of numbers (0...9) and signs (dots) used in clock and other devices. High brightness
IV-8 VFD nixie tube is a luminescent seven-segment green glow indicator that displays information in the form of digits 0...9, used in clock and other devices