Manufacturer: JAMES MILLEN Manufacturing Co., Inc. (USA)
Model: 90903, S#1159
Purpose: Monitor Oscilloscope
This is a 19in rack mounted unit. The 90903 is very similar to the 90902. Main difference is that the 90903 has a 3KP1 CRT, while the 90902 has a 2BP1. In general the last digit of the model number indicates the size of the CRT. Operation of the 90903 is the same as the 90902 and also the vertical and horizontal inputs can be accessed from the front or the rear.