P/N 1388072 - Model M Keyboard Details & Specs

Provided by the ASK Keyboard Part Number Database

IBM 7531/7532 Industrial Computer Keyboard

Known Assembly Part NumbersKnown Assembly Part Numbers
Possible numbers found inside this keyboard used to indicate its internal assembly and the keycaps on it.
A designation from my own type naming scheme used to categorise this keyboard with or from others by their common features and market intent but may/may not be derived from official names.
Model M Enhanced Industrial Keyboard
Known Host SystemsKnown Host Systems
A list of known host systems this keyboard could be bundled with or at least designed specifically to operate with. This could be terminals, desktop PCs or laptops.
IBM 7531 Industrial Computer
IBM 7532 Industrial Computer
Possible companies responsible for making this keyboard for the company marketing it.
The name of the known switching mechanism that lies under this keyboard's keys.
IBM membrane buckling springs
Earliest AppearanceEarliest Appearance
The year (and possibly the quarter) that this keyboard part number was introduced, first observed, first recorded or the first example found.
1985 Q2
Original KeycapsOriginal Keycaps
The keyboard's original keycaps' material and text/symbol printing technique.
PBT with dye-sublimated legends
Casing ColourCasing Colour
The original colour of this keyboard's outer casing. For keyboards whose casing materials are known to yellow, this will refer to the original colour before such transformation occurs.
Industrial Grey
The possible branding and logo styles found on this keyboard part number. This could be multiple styles at once or possible styles found over time.
IBM black square badge
The style of this keyboard's flip-out or extendable feet. If applicable, this may also state how many levels of height adjustment are available and whether the feet could be rubberised.
Single-setting flip-out feet
The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets).
IBM Mode 2 (scancode set 2)
The keyboard-to-host connection. This is could be a description of a cable (its colour, whether its coiled, whether its detachable, and what connector is at its end) or the name of a wireless technology.
Black coiled-style detachable 6-pin SDL to DIN (180) cable
Key CountKey Count
The number of keys that this keyboard originally had.
Form FactorForm Factor
The standardised or universally acknowledged name for this keyboard's layout form factor.
Image of Layout/LanguageThe original regional/language layout this keyboard was configured as. Both the language and the standardised key layout may be listed, and in the case of both being known or defined, it will be styled as language then standard.
Documents ("Doc"), websites and/or webpages ("Web") that were used as a source of information for this keyboard part number. Examples of this keyboard part number I own ("ASK") will also be included as sources.
Doc: IBM 7531 Industrial Computer Brief Description of Announcement, Charges, and Availability (#185-053) [source: 9999hp.net]
Doc: IBM 7531 and 7532 Industrial Computers Model 111 Brief Description, Charges, and Availability (#187-112) [source: IBM]
Web: https://deskthority.net/viewtopic.php?t=22573
Web: https://web.archive.org/web/20221013173213/https://www.ebay.de/itm/255741135730?orig_cvip=true
Related Directory EntriesRelated Directory Entries
Possible ASK Keyboard Directory entries that relate to this part number. The Directory serves as a convenient way to find and share a particular keyboard, containing links to where to find out more about the keyboard and sometimes common part numbers.
IBM 7531/7532 Industrial Computer Keyboard (w/ IBM black square badge)
A reserved special acknowledgement to anyone who has helped me with research through social media, email or via the P/N submission form for this keyboard part number.
Data Last Updated 2023-10-31

More on this type of keyboard...

Variant of a Model M Enhanced Industrial Keyboard
Variant of a Model M Enhanced Industrial Keyboard
Variant of a Model M Enhanced Industrial Keyboard

The Model M industrial keyboards were the first discreet and PC-compatible Model Ms available, originally shipping with the AT-class IBM 7531 Industrial PC starting in May 1985. Compared to the IBM Enhanced Keyboard, industrial Model Ms are essentially the same underneath but feature a grey-coloured case designed to hide the dirt and damage expected to be inflicted upon the device within an industrial environment.