Thanks for the great post! Looking forward to XVIII ct silver types. I'm collecting Russia from Catherine the Great but don't have particularly interesting collection (intended to do whole empire since 1721, but price explosion in the last years did its job, as you mentioned)
Been doing some research several years ago comparing crown types of some silver coins of XIX ct. At the glance I see such varieties here as well. Many of these are quite big differences that need to be taken into account for type collectors.
BTW, I see commemorative coins are omitted from the list. Why is that?