Seen this on a classified site, there's this picture and a "Vintage IBM Clone 5 Pin Keyboard with switches for IBM XT / AT." title to the ad. The only other picture is a close-up of the 5 pin DIN connector.
No idea if the thing is even mechanical, no visible branding to try and work out what model this is.
Not sure asking the seller for additional pics or removing a keycap is in Geekhackers' interests at this point.

Any ideas?
Thanks,
Darkshado