General Description:
Frequency meter, range rating p388.0/p412.0 hertz, current type ac, voltage rating 240.0, accuracy rating not more than 1/4 of 1 percent for 120 volt sinwave input at room temp, case dim. 3.510 in. Diameter 2.450 in. D, scale calibrated in cycles over range p388.0/p412.0 w/not less than 48 divisions white with black markings with a double width red mark at 400 cycle point, needle rests on the left hand edge when instrument is de-energized, flush mtd on 3.160 in. Bolt circle, 3 holes equally spaced 120 degrees 0.150 in. Diameter for 1 in. Lg 6-32 unc slot headed bolt and selflocking nuts, 2 terminals 1/4-28 unf-2a permanently attached, source control dwg132143163-97403 and transducer, ac input 120 volts, 1 phase 400 cycle, ac input dc output element isolated from each other and from ground, dim. 3.500 in. Max w., 3.000 in. Max h, 3.180 in. Max d, 6 mtg holes 0.188 in. Diameter located top and bottom edge 2.680 in. C to c h, 0.880 in. C to c w, 1.750 in. From c to c of out side holes, 4 no. 6-32 unc-2a terminals loca
Spain 
Kuwait