I have two small ideas to improve the display of the reference catalogues:
1. Fix the width of the images, so that pages like these look consistent:
https://en.numista.com/catalogue/catalogue.php?id=51
Currently, some images are wider than others. I think 140px would work well
2. Display Volumes with different codes in the same listing, just like Volumes with the same code.
For example, each RIC volume has a different page: RIC I, ... RIC X. But it would be nice to see them together, just like the MIR volumes.
Maybe we can have a field in the database for "same as"?