Keithley 172A DMM in pictures

Another ebay find- a  vintage Keithley 172 multimeter. The datecodes on the parts range from 1978 to 1984, placing the final assembly somewhere in mid-1980s. It seems fully  functional, but could use a bit of a calibration to regain its past precision.

For those interested, here is the user/service manual for the unit

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