On 2019-07-25 2:54 p.m., David Forbes wrote:
That looks like the original Xerox machine copy counter. It had three rotary switches whose shafts we see, along with bulbs to illuminate the numbers, to the right of the Nixie tubes.
Xerox and others often had the makers of parts put ONLY the Xerox part number on a part.
I have some 25L6GT power pentode tubes stamped only with an IBM Part number. (IBM used them as solenoid drivers in Key Punch machines)
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