GitHub - fivesixzero/keithley-169-display-replacement: Kicad files for a Keithley 169 display replacement board along with some historical information about this classic 1970's multimeter
Keithley 169 for Sale|Multimeters - 3.5 Digits|Meters|Test Equipment Center
Keithley 175A-901-01 Rev. A Model 175A Autorange Multimeter Instruction Manual | RecycledGoods.com