@JohnSchriver.
John what exactly is a 'swap' ?
Would it be like taking a camera from the
production line and engraving some previous sn
on the top. There's something about an asterisk
for duplicates, as I recall. Would there be a way
ti swap a ii for a iiif ? In essence when does an
upgrade become a swap?
Also I was thinking a moment ago about the
bottom plate with auf/Zu and Germany. I don't
think I've ever seen a plate with those markings.