The unique Treskilling Yellow itself - Sweden's 1855 3-skilling banco misprinted in yellow instead of blue-green; the only known example, used, with partial town cancels.

Treskilling Yellow (Tre Skilling Banco colour error)

Maker: Sweden (Kingdom of Sweden)
Year: 1855
Rank: 2 of 100
Identifier: 3-skilling banco misprinted in yellow (intended blue-green; the 8-skilling was yellow — a color error); the unique known example

Treskilling Yellow (Tre Skilling Banco colour error)

Realized at auction: $2,300,000, dated 1996-11-08. This is a realized sale. Somebody paid it.

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

The only known example of Sweden's most famous error and for decades the record-holder for the highest price per gram ever achieved by any object — the canonical color-error rarity.

3-skilling banco misprinted in yellow (intended blue-green; the 8-skilling was yellow — a color error); the unique known example

What is the best-sourced number for it?

Figure: $2,300,000
Kind: Realized at auction
Date: 1996-11-08

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, Treskilling Yellow (Tre Skilling Banco colour error) is number 7 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 (2 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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FLOAT is a free tracker. Add the stamps you own, keep photos and certificates with each item, and see a value built from real sales at your item's grade. This page is a public reference; it does not offer, price or sell insurance.