Three used Panel D.C. Voltmeters - all with good tested movements - overall scale calibration accuracy not tested. 1- Jewell Electrical +/- 10 Volts DC fits 2.5" diameter panel cutout. 1- Weston Model 301 voltmeter 0-50 Volts DC fits 2.63" diameter panel cutout. 1- Triplett model 327 DC voltmeter 0-150 Volts DC fits 2.75" diameter panel cutout.