Prototype Kindles
Special thanks to scam.net, Marek and Ygjsz for researching and obtaining some of these devices
Below is a collection of prototype Kindle images from the internet

Like everything, there exist developer-only versions of Kindles - surprisingly, however, some of our team have been able to find and purchase them!
This is where utilities such as screenControl came from!
Developer firmware comes with the /app/tools folder which contains internal-use tools from lab126 - most interestingly, the firmware comes bundled with kterm.
Developer Firmware Downloads
https://hackerdude.tech/vault/kindle-firmwares/scribe_diags_full_dump.7z - Dumped by Ygjsz
https://hackerdude.tech/vault/kindle-firmwares/PW5_Dev_5.14.0_3741660014_initialdumpfromlinux.img.xz - Dumped by scam.net