IBM Model M 1391403, ISO Layout, German language keycaps, with a slight upgrade...

• controller supports USB or Bluetooth connection (flip switch to select)*
• 3.7V, 2000 mAh Li-Ion battery included (use any 3.7V Li-Po/Li-Ion battery you like)
• internal battery charger will recharge battery when USB cable is connected
• maximum battery life during normal operation: ~64h, maximum battery life during deep sleep: ~8 months
• device will go to sleep after 5 minutes when USB mode has been selected and no USB cable is connected
• command line tool for easy keymap configuration, up to 6 layers are possible
• standard USB/Bluetooth HID 6-key rollover
• 2m USB-B-›USB-A cable with gold-plated connectors and ferrite bead sheath current filters included
• low current 1 mA status LEDs

Let me know if you would like any extra features or modifications (bigger battery, integrated USB hub, trackpoint, fingerprint sensor, you name it). The Model M case is big enough to allow for all kinds of tweaks and enhancements, so let's hunker down and try to make it happen!

Please don't hesitate to ask if you have any questions, I will be glad to answer them to the fullest of my capability.
Bitte zögern Sie nicht, mich zu kontaktieren, wenn Sie Fragen haben.
S'il vous plaît, n'hesitez pas de me contacter si vous auriez de questions.

International buyers, please contact me beforehand so we can figure out the details for international shipping. Shipping overseas can be very expensive and slow for bulky goods like a Model M keyboard.

*controller available separately as a drop-in replacement