The town twinning with the Swedish city Katrineholm originated from the connection between a music group from Halver and a traditional dancing group from Katrineholm.
Headquartered in Stenungsund, the company operates primarily in Southwestern Sweden in addition to Katrineholm and Norrköping.
The Saab Catherina is a 1964 prototype automobile, commissioned by the Swedish automaker Saab, designed by Sixten Sason and made at the workshops of the Aktiebolaget Svenska Järnvägsverkstäderna (ASJ - the Swedish Railroad Works) in Katrineholm, Sweden (hence the name).