Hewlett Packard HP Jornada 680
Tested; works, but is missing the stylus and one key (see pictures).
The Jornada 680 was released in 1998. It is an HVGA Handheld PC running the Windows CE 2.11 based Handheld PC Professional 3.0. The device has a 133 MHz Hitachi SH3 processor with 16 MB of integrated RAM.