When references are shown as a range only the first and last reference can be searched successfully. Searching for those in the middle doesn't work.
Example: N#1633
All reference numbers are listed individually:

but appear as a range on the coin page:

You can find this coin searching for KM# 49.1 and 49.7 but not 49.2, 49.3, 49.4, 49.5 and 49.6.
You used to be able to find it searching for any of the KM numbers. It looked like this (from 2023):


