Vtg IBM Model M122 Type III Battlecruiser Keyboard 1395660 Buckling Spring RJ45

This oversized terminal keyboard is commonly known among keyboard collectors as the Model M122 “Battlecruiser.” It features 24 function keys, specialized terminal legends, a full numeric keypad, navigation controls, and the classic heavy-duty IBM construction associated with the Model M series.

The keyboard uses a modular-style RJ45-type terminal connector and is not directly compatible with a standard modern USB or PS/2 computer without the appropriate active converter or custom adapter. Part number 1395660 was produced for IBM InfoWindow and related Twinax terminal systems. The design was introduced around 1989.

• Brand: IBM
• Model: Model M / M122
• Part number: 1395660
• Type: Terminal keyboard
• Key count: 122 keys
• Switch type: Buckling spring mechanical
• Layout: Extended terminal layout
• Function keys: F1–F24
• Connector: RJ45-style terminal plug
• Color: Beige / gray
• Nickname: Battlecruiser
• Intended systems: IBM InfoWindow / InfoWindow II Twinax terminals
• Vintage: Yes
• Copyright marking: IBM Corp. 1985
• Approximate production era: Late 1980s to early 1990s

This is not a standard Ethernet keyboard, even though the connector resembles an RJ45 network plug. It was designed for IBM terminal equipment. Modern computer use generally requires a compatible active converter or custom conversion setup. Terminal Model M keyboards can be adapted, but a basic passive Ethernet-to-USB adapter will not necessarily work.

• Untested
• Visible yellowing and discoloration from age
• Surface dust and cosmetic wear
• Some key legends are blank, faded, customized, or missing
• One numeric keypad key shows label or adhesive residue
• Cable and terminal connector are included
• No adapter, converter, computer, or additional accessories included

Please review all photos carefully. The exact keyboard pictured is the item you will receive.

Brand: IBM
Model: Model M 1395660
Type: Mechanical Keyboard
Keyboard Layout: QWERTY
Connectivity: Wired
Connector: RJ45-Style Terminal
Color: Beige
Features: Buckling Spring, 122-Key Extended Layout, F1–F24 Keys
Compatible Brand: IBM
Vintage: Yes
MPN: 1395660

IBM part number: 1395660