What is this 8-knobbed IBM human interface device in a 1980's Boeing photo?

[fzabkar]

I was employed by Computervision during those days. It's now hard to believe that aircraft were designed on a 16-bit mini with a couple of MB of DRAM and one or two 300MB hard drives (80MB in earlier versions). The workstations were powered by a Z80 CPU and connected to a 16-bit graphics card, plus a 16-bit GPU in later versions. Entire projects were backed up on 20MB mag tapes.