[R-390] What is inside R-390 meters?

[James Green]

I have a small collection of 100 milliammeters that have the same package as the R-390 meters. They are made by Simpson & look to be very high quality. I opened one up and removed the glass and dial. Inside is the movement with a wire-wound resistor (I assume) in parallel with the meter movement. 

Question 1: What circuit(s) would be inside for the line level meter?
Question 2: What circuit(s) would be inside for the "S: meter?
Question 3: Is there some site I can download the artwork for silkscreening the dials?

This is also a test.

73

Jim