Kalmartrissan is a brand of yo-yo which has been manufactured since 1932. The company that makes it, Elfverson & Co., is located in Påryd, about 30 kilometres (19 mi) from Kalmar in Småland, Sweden. In the early 1930s, Gösta Elfverson saw a yo-yo during a trip to England, and brought the idea with him to Sweden, where the manager of Elfverson's factory developed a unique construction: the Kalmartrissan is made in wood and in a single piece, rather than two pieces that have been glued together.
The toy is manufactured from beech wood, and bears a logo depicting the Castle of Kalmar, one of the best kept renaissance castles in Europe. "Trissa" is a Swedish word meaning pulley, which is sometimes used informally for other round objects, including yo-yos.
Between 150,000 and a million yo-yos of the Kalmartrissan brand are manufactured every year in Sweden.
- "Kalmartrissan" och andra "trissor" Archived 2010-08-21 at the Wayback Machine., County Museum of Kalmar (in Swedish)
- "Kalmartrissan snurrar vidare", Dagens Nyheter 19 December 2012 (not available in the on-line edition) (in Swedish)
- Kalmartrissan fyller 70 år, Sveriges radio, 25 January 2002, retrieved 22 March 2013 (in Swedish)
- Känd trissa har spunnit i 70 år Svenska Dagbladet 28 January 2002, retrieved 22 March 2013 (in Swedish)
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