This ad for the 535 oscilloscope and the 53C plug-in appeared in the April and 1954 issues of The Review Of Scientific Instruments and the June 1954 issue of Wireless Engineer.

 

This ad for the 524D appeared in the April 1954 issue of Proceedings of the IRE.

 

This ad for the 531 and 535 oscilloscopes appeared in the June and August 1954 issues of Electronics, Proceedings of the IRE, and The Review Of Scientific Instruments,

 

This ad for the 531 and 535 oscilloscopes appeared in the August and September 1954 issues of Proceedings of the IRE and the September issues of Electronic Design and Tele-Tech,

 

This ad for the 531 and 535 oscilloscopes appeared in the October issues of Proceedings of the IRE and The Review Of Scientific Instruments and the October and November issues of Electronics.

 

This ad for the 531 and 535 oscilloscopes appeared in the November and December issues of Electronics, Proceedings of the IRE, and The Review Of Scientific Instruments.

 

This ad for the 531 and 535 oscilloscopes appeared in the Autumn issue of American Scientist.