Tektronix C30A Oscilloscope Camera
Tektronix has been in business for over sixty years, and this is one of their early products, based on the roll film chamber from a Polaroid Model 150.
Tektronix C30A Oscilloscope Camera by P F McFarland, on Flickr
For 12 more photos, go to https://flic.kr/s/aHsm55UJkq
And if you are interested in seeing what Tektronix makes these days here is a link to their site https://www.tek.com/