Should play money be listed under the currency it's imitating?

I have a few of these Miniature coins for example:

(In that screenshot i'm just including these two to illustrate, but i have a whole collection of them, so this is a more general question and not just about these two in particular) As you can see the 3 Mark is listed under the Reichsmark currency and the 2 Mark from the same set has no currency specified.
I want to change them all to be uniform but i'm unsure what the standard should be so i wanna ask more general how these items should be handled. Should Play money and imitation pieces be listed under the currency they are imitating or under “unspecified currency”?

I don't really have a clear preference here, as long as i know which ones to edit to have them in the same place. 

The type depends on the reason they were issued. Knowing the mint or whether they are part of a series could help you. In Spain we have this series https://en.numista.com/catalogue/series.php?id=11747 issued as collection of play coins.

In any case, replicas or play coins, they have not currency or denomination.