A high quality US-designed cathode ray oscilloscope with plug-in amplifiers and time base all operating with semiconductor technology.
There are two dual-trace amplifiers type 7A18 (serial nos. 104759 & 104760) with sensitivities up to 5 mV/div and frequency response up to 50 MHz.
The dual time base type 7B53A (serial no. 103395) operates from 5 s to 0.5 µs/div, with many features for delayed triggering and trace expansion.
In the second image one side of the case is removed to show the type of circuitry and how the different units are screened.

Inscriptions / Translations:  7603 OSCILLOSCOPE