Not going to give us a summary?
Anyway seems like developer flash carts rather than future repro fodder. 3 of them going for $1000 USD on the tat merchant known as ebay.
https://www.ebay.com/itm/352697152672 has the listing. I did save it in case it gets taken down.
Error messages appear in a retail Switch, though given things were signed differently for dev/demo systems for the 3ds that is hardly surprising.
Edit. Might as well have the images from the listing. The error screen had no codes or anything interesting.
Click to make larger.
