Precision DC Volt Meter
and 1 megahertz
"oven" precision Oscilator
Model homebuilt SN none
Schematic:no
I have never needed the precision that this instrument offers but you might.
The DC volt meter:
0-1.9999 plus/minus vdc
0-19.999 plus/minus vdc
The 1 meg oscilator:
1.0000 Mhz
It works great.
$56