IBM Personal Computer XT/286 (5162)
After the release of the then very expensive IBM Personal Computer AT ($ 6000) in 1984, there was a need for a cheaper version. IBM decided to use the last stock of cases from the IBM Personal Computer XT and installed a slightly modified motherboard. The IBM XT/286 was born (model no. 5162).
Despite the lower clock speed (6MHz versus 8MHz), this computer performed faster than the PC AT. This is because of the faster "zero wait state" memory.
It is expected that about 20,000 were made, after which the cases were used up.
This is considered one of the rarest IBM Personal Computers.