FLOAT
A canceled single of the 1851 Baden 9 Kreuzer printed on blue-green paper in error (only four examples known) - shown as a loose stamp, whereas the constituent's headline price attaches to the famous cover sold in 2019.
A canceled single of the 1851 Baden 9 Kreuzer printed on blue-green paper in error (only four examples known) - shown as a loose stamp, whereas the constituent's headline price attaches to the famous cover sold in 2019.

Baden 9 Kreuzer Error (green colour error)

Maker
Grand Duchy of Baden (German state)
Year
1851
Rank
14 of 100
Identifier
9 kreuzer printed in green (the 6-kreuzer color) instead of rose/pink; only 4 known (three canceled, one unused); on cover

Baden 9 Kreuzer Error (green colour error)

Realized at auction: $1,730,000, dated 2019-06-08. This is a realized sale. Somebody paid it.

What is it, and why is it in the FLOAT 100?

The most famous German philatelic rarity and German auction record-holder — a plate/color-mix error, 'the Blue Mauritius of Germany.'

9 kreuzer printed in green (the 6-kreuzer color) instead of rose/pink; only 4 known (three canceled, one unused); on cover

What is the best-sourced number for it?

Figure
$1,730,000
Kind
Realized at auction
Date
2019-06-08

A realized auction price is what a buyer actually paid on the date shown, including the buyer's premium where the sale reported it. It is the strongest kind of reference price, and it is a record of one sale of one object on one day, not a promise of what the next example will bring.

By reference price, Baden 9 Kreuzer Error (green colour error) is number 11 of 99 in the stamps entries of the FLOAT 100. 75 of those 99 rest on a realized sale; the rest carry an asking price or a guide value, and each page says which. Rank within the FLOAT 100 itself (14 here) is editorial: how much an object defines its field, not price alone.

How this is made

The figure
One reference price, shown with its own kind. FLOAT does not average it with anything or adjust it for time.
Realized or not
A realized price is a completed sale. A market asking price and a price-guide value are not sales, and are labeled as such wherever they appear.
Why no grade ladder
Most FLOAT 100 entries are individual objects. There is one of this, so there is no population and no spread across grades to show.
Archive
2026-08-08

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