TBM voltmeter/ammeter

Hello all-
I have an NAF number that I cant seem to find anywhere. Does anyone know the best way to find out what it really was and what it looks like?

The number is NAF1091A-240 Ammeter but the diagram of the right console says it is a voltmeter. I need to find the accurate part number for a restore if possible.

I appreciate your help.

It's a switch selectable volt and amp meter. Throw the switch to one position and it reads volts, and in the other, it reads amps.

It is a dual Amp/Volt Meter ... made by Weston as memo serves. As you may notice the dial might vary. It might indicate that the Voltmeter 30V could be installed only. Beacuse the list of parts says the Volt-Ammeter I think it is the dual gauge noticed in the first image and in the one with the close-up view.

the Amp/Volt Meter ...


the Volt Meter ...




the pic source: the net.

and here a close-up view ....

the Amp/Volt Meter ...


the source: GRUMMAN TBF AVENGER LOWER FUSELAGE, GREEN IDENTIFICATION LIGHT