This device looks like an evolutionary step forward from the original Berkeley counter. It's been 40 years since I tore mine down for parts, but the photos look surprisingly similar despite this one being nixie-based and from a different manufacturer (HP). https://www.ebay.com/itm/RARE-HEWLETT-PACKARD-DECADE-COUNTER-523CR-NIXIE-Tube-6-DIGIT-5963-VACUUM-TUBES/254584506524?hash=item3b466b489c:g:ISQAAOSwChhem-Tc
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