Storing the coin collection

Yes, they are a very good idea, here's why. While the coins and the holders both are manufactured with a certain degree of precision it is not at all uncommon for the coins to not fit well inside their given holder, or for them to get stuck inside once they are inserted into it. In other words, because one or the other is off just slightly, they can be too tight or too loose. The rings solve that problem completely. The coins will always fit and be held securely with no movement possible, and they will always come out easily should you desire to remove them.

And before you ask, the rings are 100% inert and will not affect the coins in any way.

 

Yeah you could find out but I don't think it would be very easy. It's been some years since I've looked at the various collection software programs so there may have been updates or changes in recent years. But as I recall none of them just present you a list of all the options for every date/mint denomination combination there is for a given type that allows to see it all at a glance. You have to enter pertinent info for each coin yourself.

But you could use a coin catalogs like the Krause catalogs and look 'em up that way. But even that is labor intensive.