inductanceresistors
I found some resistors in my stash which are similar to those ceramic resistors advertised as non-inductive resistor on the internet:
The dot is not standard. It is a marker on the resistor symbol to indicate pin 1. The only reason I can think of when this is useful is when using the circuit for spice simulations so that you know what side to probe for pin 1 or the orientation for current.
Update: Asked around some more and found someone who does this on schematics! The answer they gave me as to why: "it helps when debugging the board". They place the dot on the printed circuit board as well as in the schematic. That way when they are debugging they can quickly determine which side of the resistor they are probing without having to trace the line.
Avoid this style. You will confuse people!
These are likely (we can't know for sure without knowing the manufacturer) non-inductive wire-wound power resistors. This is sometimes characterized by that final black band.
They, unlike normal wire-wound resistors, avoid inductance by having half the windings wrap the opposite direction. You can kind of see that under the ceramic.
You are quite right in that they are probably for current sensing.
Best Answer
Looks like it
Run a square wave through it and look at the rise times, or do a frequency sweep and characterize the roll off with a known amplitude. Smart tweezers might also work. Or try this: https://www.circuitsgallery.com/measuring-inductance-with-oscilloscope/
Basically you have a series RL circuit and you know the resistance (20mΩ) You need to find L.
Probably company or product logo