The 422 oscilloscope is a 15 MHz dual channel portable oscilloscope and first appeared in the April 1966 Tektronix catalog. The 422 could be powered from a wide variety of sources depending upon which power supply options were ordered.  The AC model could be powered from 115V or 230V AC 45 to 440 Hz.  The AC/DC model could also be powered from 11.5V to 35VDC.  There was also a 24V battery pack available.  The selling price for the AC model was $1400 in the 1966 catalog and was in production until 1975.  Early versions used a nuvistor tube for the front end.

 

This promotional matchbook was produced for the 422.  Note there is an error as it says "High Wiring Rate" instead of "High Writing Rate".