We all should have noticed that there is now a “Currency” field on the search page yet there is no option for “unspecified”, “unknown”, “missing” or “empty” i.e. coins that have not been assigned a currency.
You cannot enter anything into the “Denomination” field unless you have selected a “Currency”
Entering “missing” into face value field returns all coins that have not been assigned a “value” but many of these have been assigned a currency or are “Æ”
In terms of modifying pages with no denomination:
There are thousands of coins where the denomination is in the title but cannot be put in the denomination field because currency is unspecified and or face value (fraction of 1 unit of currency) is unknown/unspecified.
An example: 1 Pfennig - City of Fürstenwalde – Numista