5 Kronor 1966, Sweden
| in Krause book | Number: 51a |
| Years of issue: | 1966 |
| Edition: | -- |
| Signatures: | Riksbankschef: Carl-Henrik Nordlander (1977–1979), Åke Gustafsson |
| Serie: | 1963 - 1976 Issue |
| Specimen of: | 1965 |
| Material: | Cotton fiber |
| Size (mm): | 110 х 68 |
| Printer: | Tumba Bruk (Crane and Co.), Tumba, Sweden |
* All pictures marked 
are increased partially by magnifying glass, the remaining open in full size by clicking on the image.
** The word "Specimen" is present only on some of electronic pictures, in accordance with banknote images publication rules of appropriate banks.
Description
Watermark:
The diamonds with denomination in numeral inside.
Avers:
Gustav I, born Gustav Eriksson of the Vasa noble family and later known as Gustav Vasa (12 May 1496 - 29 September 1560) was King of Sweden from 1523 until his death, previously self-recognised Protector of the Realm (Rikshövitsman) from 1521, during the ongoing Swedish War of Liberation against King Christian II of Denmark, Norway and Sweden. Initially of low standing, Gustav rose to lead the rebel movement following the Stockholm Bloodbath, in which his father perished. Gustav's election as King on 6 June 1523 and his triumphant entry into Stockholm eleven days later meant the end of Medieval Sweden's elective monarchy as well as the Kalmar Union. This created a hereditary monarchy under the House of Vasa and its successors, including the current House of Bernadotte.
Three denominations in numerals, one in words.
Revers:
Stylized grouse (western capercaillie) on a lek, on the background is a fir tree.
The western capercaillie (Tetrao urogallus), also known as the wood grouse, heather cock, or just capercaillie, is the largest member of the grouse family. The largest known specimen, recorded in captivity, had a weight of 7.2 kg. (16 lb.). The species shows extreme sexual dimorphism, with the male twice the size of the female. Found across Eurasia, this ground-living forest bird is renowned for its mating display. The worldwide population is categorized as "Least concern" by the IUCN.
The species was first described by Linnaeus, in his Systema naturae, in 1758 under its current binomial name.
The capercaillie is a non-migratory sedentary species, breeding across northern parts of Europe and western and central Asia in mature conifer forests with diverse species composition and a relatively open canopy structure.
The breeding season of the western capercaillie starts according to spring weather progress, vegetation development and altitude between March and April and lasts until May or June. Three-quarters of this long courting season is mere territorial competition between neighbouring cocks or cocks on the same courting ground.
At the very beginning of dawn, the tree courting begins on a thick branch of a lookout tree. The cock postures himself with raised and fanned tail feathers, erect neck, beak pointed skywards, wings held out and drooped and starts his typical aria to impress the females. The typical song in this display is a series of double-clicks like a dropping ping-pong ball, which gradually accelerate into a popping sound like a cork coming of a champagne bottle, which is followed by scraping sounds.
Towards the end of the courting season the hens arrive on the courting grounds, also called "leks", Swedish for "play". The cocks continue courting on the ground: This is the main courting season.
The cock flies from his courting tree to an open space nearby and continues his display. The hens, ready to get mounted, crouch and utter a begging sound. If there is more than one cock on the lek, it is mainly the alpha-cock who engages in sexual intercourse with the hens. In this phase western capercaillies are most sensitive to disturbances. Even single human observers may cause the hens to fly off and prevent copulation in this very short time span where they are ready for conception.
There is a smaller courting peak in autumn, which serves to delineate the territories for the winter months and the next season. 
Three denominations in numerals.
Comments:
Designer: Eric Palmquist.
Engraver: Albert Jorpes.
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