However, it was not until revision of the Rule in 1920 when the Sixes really became a popular international racing class. The 1920s and '30s were 'golden age' of the International Rule boats and Sixes were still the most popular class, attracting top sailors and designers to compete for prestigious trophies such as Scandinavian Gold Cup and Olympic medals.
It wasn't until the revision of the rule in 1920 that the Sixes became a highly sought-after international racing class. The 1920s and '30s are commonly regarded as the heyday of International Rule boats, with the Sixes continuing to be the most popular class, attracting top talent who competed for prestigious awards like the Scandinavian Gold Cup and Olympic honors.