I'm not sure of the Hurco lineup in 1979. My 1989 BMC-20 has a 14" wide table, and 14" of Y travel, and a 16-tool carousel toolchanger.
A single screen control could be a B or a BX control. I don't know if Ultimax was available in a single-screen configuration.
Are you certain that it's a 1979 model? I believe that the first, and last digits of the serial number taken together show the machine's year.