In the UK we had Dekatrons that could come in a variety of different bases: > While most dekatrons are decimal counters, models were also made to count in base

In the UK we had Dekatrons that could come in a variety of different bases: > While most dekatrons are decimal counters, models were also made to count in base-5 and base-12 for specific applications. Source: https://en.m.wikipedia.org/wiki/Dekatron https://en.m.wikipedia.org/wiki/Dekatron I’ve personally played on the Harwell Dekatron, it’s a fun machine https://www.tnmoc.org/first-generation-gallery https://www.tnmoc.org/first-generation-gallery