Importing an off-card backup of the encryption key of a Nitrokey fails with "no user ID"

[Ralf]

Hi Peter,

> looking for difficult workarounds :-). If I'm wrong about that, just say
> so and I'll give an example. I'll whip out a blank OpenPGP card, create
> a test key and do it, posting the results on the list.

I was hoping for something simple and I think eventually this should be 
simple; nevertheless I would make use of such a workaround / would be 
thankful for such an example :)

Greetings,

Ralf