O-12 5 Inch Scope.

Vertical frequency response:  3 Hz to 5 mHz, plus or minus 1.5db--5db without extra switching.
Down 2.2db @ 3.58 mHz.

Sweep:  10 Hz to more than 500 kHz in 5 steps.

Automatic sync with self-limiting cathode follower for good linearity and lock-in.

Short retrace time.

Efficient blanking.

Push-pull Vert. & Horiz. amps.

1-v calibrator.

Step-attenuated and frequency-compensated vertical input.

11 tubes, including 5UP1 CRT.

Z-axis input for intensity-modulation of beam.

Horiz. amp response:  Plus or minus 1db from 1 Hz to 200 kHz.

Horiz. sensitivity:  0.3-v RMS/inch.

22 lbs.  
Price in 1958:  $65.95.