In de Pick catalogus staat een toelichting welke criteria ze voor varianten gebruiken, zie quote. De toegevoegde waarde zal beperkt zijn. Colnect wordt naar mijn weten door gebruikers gevuld, ik neem aan dat die ook het subnummer bedenken. Ik vraag me af hoe ze omgaan als er een "nieuwe" datum tussen 2 andere datums ontdekt wordt. Krijgen degenen na deze datum dan een nieuw subnummer?
Jouw voorbeeld is wel extreem, maar liefst 44 varianten op Colnect... Persoonlijk houd ik Pick aan. Voor NL-biljetten daarnaast Plomp, daar worden wel varianten genoemd, maar lang niet zo extreem als op Colnect.
Dates and Date Listing Policy
In previous editions of this work it was the goal to provide a
sampling of the many date varieties that were believed to exist. In
recent times, as particular dates (and usually signature combina-
tions) were known to be scarcer, that particular series was
expanded to include listings of individual dates. At times this idea
has been fully incorporated, but with some series it is not practi-
cable, especially when just about every day in a given month
could have been an issue date for the notes.
Accordingly, where it seems justifiable that date spans can be
realistically filled with individual dates, this has been done. In
order to accommodate the many new dates, the idea of providing
variety letters to break them up into narrower spans of years has
been used. If it appears that there are too many dates for a series,
with no major differences in value, then a general inclusive date
span is used (beginning and ending) and individual dates within
this span are not shown.
For those notes showing only a general date span, the only
important dates become those that expand the range of years,
months or days earlier or later. But even they would have no
impact on the values shown.
Because a specific date is not listed does not necessarily
mean it is rare. It may be just that it has not been reported. Those
date varieties known to be scarcer are cataloged separately.
Newly reported dates in a wide variety of listings are constantly
being reported. This indicates that research into the whole area is
very active, and a steady flow of new dates is fully expected upon
publication of this edition.
Verzamelaar van (graded) bankbiljetten.
