In addition to the Fm2/Fm2n, which Nikon's used the red LED lights with the +0- to indicate proper exposure? I know the FE2 used a needle, not the LED.
Also the F2AS has pretty much the same "traffic lights" arrangement.
The F2S had a slightly different one with just 2 lights for + and -. These were arranged as arrows to show the direction you should move the aperture ring. Correct exposure was with the 2 arrows illuminated.
Can confirm this, FG had LEDs and solid was your selected speed, blinking was the camera's recommended speed and it had arrows on the top and bottom for exposure beyond what the camera was capable of shooting in Aperture Priority.
Also the F2AS has pretty much the same "traffic lights" arrangement.
The F2S had a slightly different one with just 2 lights for + and -. These were arranged as arrows to show the direction you should move the aperture ring. Correct exposure was with the 2 arrows illuminated.
You should see the Pentax MX arrangement, along the side. Center is green, above that is yellow, above that is red. (Yellow and red under the green, too.)
For Kris: you know that the FM10 is a Cosina made SLR, don't you?
It is just badged Nikon.
But, for all purposes it says Nikon on the front.
There are other Nikon mount SLRs: Kiev 19 and some Phenix bodies.