FYI, the founder of this here GeekHack site reportedly purchased the very last SSK that Unicomp themselves assembled, back in 2007. It was an ANSI model and even labeled as P/N 1393278, though it was a Unicomp birth certificate and the oval badge in the upper-left of the top case was kept blank. He got it for USD $59 smackeroos. After taking delivery of it, he called them to order another, and was told that they had used the last remaining parts to build the keyboard he just received. So though Unicomp may have had a custom (non-IBM-inherited) part# for an ISO variant, they were also building ANSI models under the original IBM P/Ns up until the end as well.
The pictures on the original post no longer work, but The Wayback Machine
has our back on this one.
