with decimal points These numeric tubes all have decimal points too. B54370A The B54370A seems to be a variation of the B5441A - it has a comma in place of one of the decimal points, probably for use in displaying thousands. GN-4P This version of the GN-4 has a red-coating and a decimal point on the left and was manufactured by Lorenz SEL. IN-16 The IN-16 is a small nixie tube made by Gazotron in the former USSR. LC-531 The LC531 is a medium sized nixie tube made by Unitra-Dolam of Poland. It has two decimal points in addition to the numbers 0-9. NL5441A A smooth-topped version of the B5441/NL5441. This became very popular when a few Divergence Meters were built using this tube. 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.