Here is a video from World of Tanks North American on the history of Swedish tanks.
Video Description (from youtube):
Swedish tanks were built with Scandinavian precision. They were expensive, high-quality, and produced in limited quantities. It may seem strange that a country that never fought in the 20th century managed to create their own tank building legacy. That is why we’re shining a spotlight on the story of how the most famous Swedish vehicles, from Landsverk to Strv 103, were created.