I think I can guess who it was - the same people who made the one I took out of an old BaE systems place a few years back I suspect.
I posted about it at the time, and was amazed to find the company apparently still trading with a very 1990s looking website.
Their products also seemed to be rebadged by Chubb at one time, and the website had the same ones I remember from banks
back then including the 5 digit ones that were like 5 typewriter keys in a row, no numbers, in a folded metal case to hide your finger movements.