[Thomas] found an interesting probable millivoltmeter with some Beckman displays. Like many instruments from that time period, this one had a lot of tobacco smoke residue inside. The display unit inside had a sticker that not only showed the company that made it, but also had their Telex number on it, another sign of the times. You can see the device in the video below.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/28/digital-meter-from-1973-a-teardown/