Turn coordinator -v- Attitude Indicator

[The Terminator]

@ Flamin_Squirrel

Yaw is rotation about the normal axis.

Edit to answer thread:

And to answer the original question, Nether turn co-ordinator nor turn and slip measure angle of bank, obviously, as the angle of bank that gives a rate one turn when in a co-ordinated turn changes depending on the aircraft speed, meanwhile the markings on the instrument do not.