Mission souvenir tokens can they be logged?

I've been to quite a few missions and tend to never miss on their souvenir coins (unless they have no gift shops). I do not have them on me currently but would they fall under nickel exonumia? 

welcome to Numista!

yes, those could be found in exonumia.  medals > religious medals

like these for example -

https://en.numista.com/catalogue/series.php?id=2476

Numista has a place for them. if they are not already in the catalog, you are welcome to add them yourself.

Learn how

Mr. Midnight

welcome to Numista!

yes, those could be found in exonumia.  medals > religious medals

like these for example -

https://en.numista.com/catalogue/series.php?id=2476

Numista has a place for them. if they are not already in the catalog, you are welcome to add them yourself.

Learn how

If I don't know their comp what do I log them as? I guess nickel but they look increasingly different to those that are there.

 Leave the Composition section blank - such as on this random page 

N#376313