Can someone please help me with buying a 122-key keyboard?

[woubulbus]

(please excuse my complete ignorance)
Im no fanatic when it comes to keyboards, I just want a 122-key buckling spring keyboard in beige with so I went to the unicomp configurator and there was;
PC122 -3270
PC122 -5250
Terminal 122-3270
Terminal 122-5250
and I have no idea what any of these mean, so I was hoping someone could please tell me?
If anyone has any other suggestions, I'm all ears. I cant thank you all enough.
Please forgive me for being a total moron.

[fohat.digs]

It looks like the PC 5250 is the only one that they still make in beige. They say "white" in the listing but the actual colors are "pearl" and "pebble" in IBM parlance.

[woubulbus]

thank you so much, man.

[woubulbus]

real quick, do you know the difference between the 3270 and the 5250?

[fohat.digs]

do you know the difference between the 3270 and the 5250?

Where are you seeing that as a keyboard? Can you post a link?

The 3270 system was very early, and that original gear would be vintage.

https://en.wikipedia.org/wiki/IBM_3270_PC

[woubulbus]

https://www.pckeyboard.com/page/product/KBDCFG
and on the configurator:
Pearl / Pearl > US > PC122 -3270 (or) PC122 -5250

[fohat.digs]

Whoa!

I forget that an important component of Unicomp's business model is catering to really arcane and archaic systems that are still in use.