Missing mint mark J for 5 Deutsche Mark 1975?

Hello,
I have a 5 Deutsche Mark coin dated 1975 with mint mark J (Hamburg).
On this page, the listed mints are D, F, and G, but I don’t see J mentioned.

Could you please confirm whether mint J (Hamburg) should be included for this issue, or if it belongs to a different variant page?

Thank you.

Hello and welcome to numista.

Are you sure, you really have a pattern coin or just the normal circulating coin N#843 

Hello Sjoelund,
Thank you very much for your reply.

I’m totally new to Numista and still learning, so I’m sorry if my question was unclear. I don’t really know what I’m doing yet. I’m just cataloguing my grandfather’s coin collection and trying to understand things as I go.

I have taken photos of and attached them here so you can have a look.
https://photos.app.goo.gl/Qgu6hhVQphNN2Q6c6
Thank you again for taking the time to reply and help.

Best regards,

That's the circulating coin from the link I gave you.

With practice, you'll learn how to use numista correctly.

With a search like this:

you get those results:

That should make it easier for you?

Hello,
Thank you very much for the explanation and the step-by-step guidance , that really helped.

I understand it now. I got it wrong because I relied too much on how the example pictures looked instead of checking the correct reference entry properly.
Thanks again for taking the time to explain it so clearly.

Best regards,