I managed to find the silk screened board name on the Keurikon board. Its an HK68/V10. "HK68 68000 128K UNIX ?? 84" Quoted from http://www.classiccmp.org/mail-archive/classiccmp/1997-05/0519.html So it is in fact a SBC. I don't have a clue as to why it is inserted in the Solbourne box, it is of the era of the Solbourne date wise (the Solbourne 5/600 I have has November 1990 stamped over its original label of 1988, the HK/68 was originally built in 1984, and mine is copywrite 1989). You originally found the machine, any clue as to what governmental branch it was originally under?