Offered for sale is a SHIELDED PANEL MOUNTED METER in good working condition. I had several of these that were used for SWR meters, etc in the past. This is the only one remaining in my collection.
It is an 'API Instruments' Curved Face Meter, MODEL 371. Opening required is 1 5/16" x 3 7/16" with two mounting holes on 3.812" centers. Full Scale is 1 ma. D.C. Depth from panel is about 4 1/4 ". A very nice meter movement for your project.