IBM 3277 Terminal
Here are some pictures of my IBM 3277 terminal. I got it recently and cleaned it up including dissembling and cleaning up the keyboard. This is the 3277 Model 2 that has an 80 columns by 25 characters screen. You can see some burn-in on the CRT. I’m sure this was a workhorse that was on 24×7 and has seen plenty of work.
I would have loved to know what it was attached to and where but this comes from someone who purchased it on Craigslist in California so I don’t have specific details. Information on IBM 3270 based terminals is well documented in Wikipedia here: https://en.wikipedia.org/wiki/IBM_3270 along with specifics on the 3270 protocol. If you ever heard the term “green screen”, this is where it came from.
This particular terminal has a classic IBM Beam Spring keyboard. You can see an alternate Micro Switch based Typewriter style keyboard I also have here.