P/N 59G9757 - Model M5-2 Keyboard Details & Specs

Provided by the ASK Keyboard Part Number Database

IBM Enhanced Keyboard with 25mm Serial Trackball

FRU Part NumberFRU Part Number
Field Replaceable Unit
The number used to relate and indicate compatible but otherwise potentially different keyboards that could replace this one.
13H6724
Market Model Name/Feature CodeMarket Model Name/Feature Code
The consumer-friendly model number describing this keyboard as a part of a range of products, usually irrespective of target region, language or SKU.
5237
TypeType
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 M5-2 Trackball Keyboard
OEMOEM
Possible companies responsible for making this keyboard for the company marketing it.
Lexmark
Key-switchesKey-switches
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.
1993 Q1
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.
Pearl White
BrandingBranding
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 blue oval badge
FeetFeet
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
ProtocolProtocol
The protocol(s) this keyboard can use to speak to the host computer (eg, scancode sets).
IBM scancode set 2
ConnectionConnection
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.
Grey coiled-style detachable 6-pin SDL to DIN (180) & DE-9 cable
Key CountKey Count
The number of keys that this keyboard originally had.
101
Form FactorForm Factor
The standardised or universally acknowledged name for this keyboard's layout form factor.
Full-size
Layout/LanguageLayout/Language
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.
US ANSI
Built-In MouseBuilt-In Mouse
Possible pointing devices this keyboard could carry. This could be a brand name, name of the sensor technology behind it, or a generic description in lieu of the former details.
25mm trackball
Additional NotesAdditional Notes
Extra notes about this keyboard that may be of interest or are important to know.
Sold under OPTIONS by IBM brand
Source(s)Source(s)
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 Announcement Summary - February 9, 1993 (#C93-002) [source: IBM]
Doc: IBM Personal System/2 Hardware Maintenance Manual (#S52G-9971-02) [source: Ardent Tool]
Data Last Updated 2022-08-22

More on this type of keyboard...

Variant of a Model M5-2 Trackball Keyboard
Variant of a Model M5-2 Trackball Keyboard
Variant of a Model M5-2 Trackball Keyboard
Variant of a Model M5-2 Trackball Keyboard
Variant of a Model M5-2 Trackball Keyboard
Variant of a Model M5-2 Trackball Keyboard

The Model M5-2 is one of two variants of the Enhanced Keyboard featuring an integrated trackball pointing device attachment, along with the M5-1. The M5-2 uses a 25mm trackball placed on the top-left corner of the keyboard case and features eight mouse buttons; two for left and right click and two for left and right stepped-click, with both pairs repeated on the back-side of the trackball module. Unlike the M5-1, the M5-2 has remained in production and continues to be produced by Unicomp as the Unicomp Classic Trackball Keyboard (also previously called "On-The-Ball"). Collectively, the M5s were the last introduced Model M variants to feature a modular SDL connection. However, Unicomp has since moved the M5-2 to a fixed cable design.

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