I came across this Univac photograph online, showing three people working in a computer room. Using a reverse Google Image Search, it appears that this image and a few others like it were posted online around 2006. From there it looks like the pictures were blogged here and there, recently posted to Pinterest, then making their way to Instagram. I can’t seem to find the original image online, but this one looks like a scan of a partially damaged photo most likely used for marketing. It’s possible that this image could be printed in a brochure other other advertisement.
The image above is a little fuzzy, but the mainframe appears to be a Univac 494. This would date the photograph to 1965 or 1966 or so. The additional photographs below offer a closer view of the mainframe console and its peripherals. There’s also more information on the Univac 494 at Ed Thelen’s website.