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

Treskilling Yellow (Tre Skilling Banco colour error)

Treskilling Yellow (Tre Skilling Banco colour error) by Sweden (Kingdom of Sweden) (1855) is ranked 2 in the FLOAT 100 for Stamps. It sold for $2,300,000 on 8 November 1996. 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.

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: 8 November 1996

David Feldman, 8 Nov 1996, ~2,880,000 CHF (~$2.3M) — the last PUBLICLY disclosed figure. Resold by Feldman (2010) and by private treaty to Count Gustaf Douglas (2013); both later prices kept confidential by the buyers, so no verifiable 2024-2026 figure exists.

This is a realized sale. Somebody paid it. Source.

How this is made

The figure: One reference price, taken from a named public source and 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