Manufacturer: JAMES MILLEN Manufacturing Co., Inc. (USA)
Model: 90902, S#665
Purpose: Monitor Oscilloscope
This is a 19in rack mounted unit. The 90902 was built over a long period by Millen. Earlier units like this one have the power supply with individual components. Later versions are 90902-2 have a power supply module 90202.
Scopes like this were mainly used for frequency matching and alignment. It could conveniently be mounted in a 19in rack together with other equipment. Vertical and horizontal inputs are at the front and also the rear.
This unit was restored and had most of its capacitors replaced.