Hivac of the UK are known for the distinctive gold color of their anodes, which makes their tubes particularly collectible.

GR10J <p>The GR10J numicator by HIVAC. A lot of HIVAC tubes have a distinctive gold-colored anode.</p>
XN3 <p>The XN3 numicator is a medium-sized nixie tube made by Hivac of England.</p>
XN12 <p>The Hivac XN12 numicator</p>
XN-13 <p>Hivac XN-13 Numicator. This has Hivac's signature gold-colored anode grid.</p>