Model 537. One-third octave equalizer. 27 band fader controls, EQ in/out switch, gain control, 2U space rack unit. Silverface. Terminal style connectors. Face is good condition, one minor 1 inch scratch at right edge. Faders have typical stiffness, have been cleaned, can be further cubed. Faders, caps, lettering all intact. 8+ condition. * Cap and coil * -Call us, we can restore your Urei!-