NL5971, B5971, B-5971 Alphanumeric Nixie Tubes 6 pcs, NOS/NIB, MOD-SIX Clock. Up for sale sale are 1 lot of 6 each NOS/NIB National NL 5971 planar alphanumeric Nixie tubes (same as Burroughs B 5971). There are a limited quantity of these tubes remaining. These tubes are unused in their original factory packaging and are in perfect condition, each tube is guaranteed to be good. They would make an excellent clock display, again this sale is for 1 lot of 6 pieces.I will carefully pack these tubes so that they travel unharmed. Auctiva offers Free Image Hosting and Editing. The item "NL5971, B5971, B-5971 Alphanumeric Nixie Tubes 6 pcs, NOS/NIB, MOD-SIX Clock" is in sale since Thursday, November 5, 2020. This item is in the category "Collectibles\Clocks\Vintage (1930-69)\Other Vintage Clocks". The seller is "39redfern" and is located in Inwood, New York. This item can be shipped worldwide.