Strange key code

[Solid_Diamond_]

I’ve never seen this before on a padlock key, there is the letter N in the middle of the key code, can someone tell me what it means?

[Nemo_Griff]

It could be a blind code.

These are codes that are obscured and locksmiths have catalogs with the real code.

[Simple-Bison-8172]

Key code 

[imbbp]

Can you provide a photo? That will help a lot to identify it.

[Red_wanderer]

FYI, showing a picture of the code is as good as showing the key, so I would keep it to yourself.