The Hewlett-Packard HP 21MX M-Series is a vintage 16-bit minicomputer from the HP 1000 family, originally introduced during the 1970s. This unit features the recognizable front control panel with toggle switches and status indicators.
IMPORTANT—INCOMPLETE UNIT. This chassis appears to be missing its removable processor, memory, and I/O circuit boards. The card cage/backplane, enclosure, front control panel, fans, power-supply area, and other components shown remain present. Exact processor model could not be confirmed from the available identification markings.
Condition:
* Selling strictly AS-IS for parts, repair, restoration, or display
* Untested; power-on condition is unknown
* Incomplete—internal circuit boards appear to be missing
* No functionality or completeness is guaranteed
* Cosmetic wear, scratches, discoloration, and other signs of age and storage are present
* Only the components shown in the photos are included
* Please review all photos carefully to determine condition, configuration, and included components
A scarce piece of Hewlett-Packard computing history that may be suitable for a collector, museum display, restoration project, or as a source of vintage replacement parts.
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