AFA Model VU-1S Analog Meter assembly

These meters have balanced, (XLR) looping inputs and are calibrated for +4DBm setting.   The meters work fine, but the Right Channel meter will occasionally stick at the very bottom of its range (-20 db).   The case is in fair to good condition, with a couple of small defects in the front panel, just below the "B" channel meter, along with some wear around the rack ears. 

There is a small access panel on the rear for calibrating the meters to a different reference input level.  

The Meter lamps and power cord have been replaced.

The unit is fairly shallow, measuring about 6.25" from the face plate to the rear panel.