The modern philatelic rarity issued by Sweden Post is the north Swedish Horse stamp of 1994. There is only on the booklet of this stamp known with the denomination 3.60 kronor seen on each of the 10 stamps. The standard booklet of this stamp consist five stamps with two horse design seen and denomination.
The unique Variety of booklet with 10 stamps was never issued but was it single specimen that was auctioned. The cover of this stamps booklet consist is also unique, it describes its 3.60k stamp and is printed in two colours. Christoph Gaertner’s auction sold this stamp’s booklet for 23,300 dollars.
Image Courtesy: wellcentred.wordpress.com