This is an Osborne 1 in the later "blue" case with a detachable power cord and hinged power-cord compartment cover. There is a sticker on the keyboard that says,"Support (800), The Xerox Factor, 1-800-243-7822, Support (800), Service I.D.# 3583.". Key caps show very little wear, in striking contrast to the outside of the case.
Osborne Computer Corporation
3583 Service ID number written in blue ink on sticker on keyboard
overall: 9 x 20 x 17 in
Digital computer/personal computer/portable / luggable