A nice feature would be the ability to find (common) errors in your collection. Some of these can already be done if you download your collection and then apply some excel magic … but some standard search functions would be nice-to-have to automate it.
For example:
- Show types of which I have multiple yearlines in my collection (only useful for type collectors)
- Show coins/banknotes/exonumia of which I have marked multiples in my collection (useful for everyone, except hoarders 😉)
- Show types that I do not have in my collection, but do appear in my swaplist
- Show types where I have a coin for swap that has better grade than the one in my collection
- …
Please add your suggestions.
- Are you sure the coin is proof (show types/yearlines that are marked as “proof”) [mikimaus]
- Find "undetermined" yearlines in collection [JLHare Create a line "Undermined" on My Collection grades – Numista]
These queries could be performed from the "my coin" page (etc) or from a separate “correct my collection” page
