[Boatanchors] Looking For DuMont Meter

[Byron Tatum]

Hello-
    I am looking for a particular meter to mate with the one I have, which 
will be used to monitor the screen current in a dual tube tetrode amplifier. 
I wish to have two identical meters in order to monitor the screen current 
of each tube. What I like about the Dumont meter that I have is that it will 
read negative screen current. The "zero" point is upscale a bit and it will 
read to -20 mA.
    The Dumont meter is:
                                Size: 3" square, mounts in 2-3/4" round hole
                                Case: Standard black bakelite
                                Scales: Has 3 scales- 20-0-100
                                                                        0-250
                                                                        0-500
                                Marking: Has "DU MONT" and nothing else on 
faceplate.
    I am not sure of the movement itself, it is not marked on meter 
faceplate. I have not checked resistance of meter yet.
    As I may not have any luck finding a mate for my meter if anyone has a 
pair of nice meters with an offset "0" with about -20 or so and +50 mA scale 
I would be interested.
    Anyway, thank you for the time, Byron WA5THJ.