There are a few types of these gauges. Most have aprrox' 13 inches of nichrome winding. 1 ohm per inch @ 68F = approx' 13 0hms, and 1.5 ohms per inch @68F = apprrox' 20 ohms. All 3 rally gauges are 20 ohms.
There was a earlier type that had about 3/4 inch of the wire ran lengthwise on the beam underneath the winding. That was so both ends of the wire would be at the upper end of the beam where there less movement.
