I've gotten a few goodies recently,
A few textbooks I have bought are Fluke's Calibration : Philosophy in practice. The hardcover is in pretty average condition, but all the pages look to be really good.
Another textbook is Resistor Theory and Technology by Felix Zandman (Founder of Vishay)
I also purchased a nice looking set of Dana current shunts. They are a similar concept to the Agilent 34330A, but there are 6 of them in a wooden case. The resistances range from 0.1R through to 10K000
I will post some photos when they arrive, I cannot find much info on them other that this from the 1984/1985 instrument catalog
https://archive.org/stream/Racal-danaInstrumentsCatalogue1984-85/Racal-danaInstruments1984-85_djvu.txtAccessory No. 85 Model 651 Current Shunt Set
The Model 651 Current Shunt Set consists of six
precision shunt assemblies designed to plug into the
input terminals of a digital voltmeter. Each shunt is
clearly marked with the full-scale range that is
established for the DVM. All six are packaged in a
wooden box lined with formed foam to prevent loss or
damage of the shunts.
Specifications
Resistance Value (current ranges)
0-1000 mA shunt: 0.1 ohms
0-100 mA shunt: 1.0 ohms
0-10 mA shunt: 10 ohms
0-1 mA shunt: 100 ohms
0-100 ^A shunt: 1000 ohms
0-10 pA shunt: 10,000 ohms
Accuracy: ±.01% plus DVM accuracy
Overrange Current without Damage: 500%
Temperature Coefficient
0-1000 mA & 0-100 mA shunts: 20 ppm/°C
0-10 mA shunt: 10 ppm/°C
0-1 mA & /iA shunts: 5 ppm/°C
Connectors: Banana plugs and jacks
Dimensions
Shunt Body: 32 H x 15.9 W x 15.9 D mm
(1V4 H x % W x % D inches)
Shunt Set Box: 165 H x 88.9 W x 50.8 D mm
(6V2 H x 3 1 /2 W x 2 D inches)